Microstructure-Fracture Behavior Relationships of Slot-Welded Rail Steels
Microstructural analyses of the parent pearlitic and bainitic rail steels were performed, and the results were compared with the microstructure of the welded pearlitic and bainitic steels. An increase in the ASTM grain size number of the heat-affected zone (HAZ) for both pearlitic and bainitic slot...
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| Veröffentlicht in: | Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2011-09, Vol.42 (9), p.2706-2715 |
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| creator | Allie, Aldinton Aglan, Heshmat Fateh, Mahmood |
| description | Microstructural analyses of the parent pearlitic and bainitic rail steels were performed, and the results were compared with the microstructure of the welded pearlitic and bainitic steels. An increase in the ASTM grain size number of the heat-affected zone (HAZ) for both pearlitic and bainitic slot welds was observed. The microstructural features that were identified in the weldment of both slot-welded steels were very similar. This was expected since the same welding wire was used to weld both rail steels. The weld consisted of mainly ferrite and had similar grain size. The fusion zones of the welded pearlitic and bainitic rail steels were examined after flexural tests to determine if there were any cracks present due to improper or weak fusion. Examination of the entire fusion zone under high optical magnification revealed no cracks, indicating that a perfect fusion was achieved. The three-point flexural behavior of the parent pearlitic and bainitic steels was evaluated and compared with that of the slot-welded steels. It was found that that the welded pearlitic steel has superior fracture resistance properties when compared to the parent pearlitic steel. The average fracture resistance of the parent pearlitic steel was 79 MPa√m compared to 119 MPa√m for the welded pearlitic steel. The slot-welded bainitic steel, however, showed similar fracture resistance properties to the parent bainitic steel with average values of 121 and 128 MPa√m, respectively. The failure mechanism of the welded and parent pearlitic and bainitic steels was also identified. Microvoid coalescence was observed in both welded rail steel samples. This was manifested by dimpled features, which are associated with ductile failure. |
| doi_str_mv | 10.1007/s11661-011-0665-4 |
| format | Article |
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An increase in the ASTM grain size number of the heat-affected zone (HAZ) for both pearlitic and bainitic slot welds was observed. The microstructural features that were identified in the weldment of both slot-welded steels were very similar. This was expected since the same welding wire was used to weld both rail steels. The weld consisted of mainly ferrite and had similar grain size. The fusion zones of the welded pearlitic and bainitic rail steels were examined after flexural tests to determine if there were any cracks present due to improper or weak fusion. Examination of the entire fusion zone under high optical magnification revealed no cracks, indicating that a perfect fusion was achieved. The three-point flexural behavior of the parent pearlitic and bainitic steels was evaluated and compared with that of the slot-welded steels. It was found that that the welded pearlitic steel has superior fracture resistance properties when compared to the parent pearlitic steel. The average fracture resistance of the parent pearlitic steel was 79 MPa√m compared to 119 MPa√m for the welded pearlitic steel. The slot-welded bainitic steel, however, showed similar fracture resistance properties to the parent bainitic steel with average values of 121 and 128 MPa√m, respectively. The failure mechanism of the welded and parent pearlitic and bainitic steels was also identified. Microvoid coalescence was observed in both welded rail steel samples. This was manifested by dimpled features, which are associated with ductile failure.</description><identifier>ISSN: 1073-5623</identifier><identifier>EISSN: 1543-1940</identifier><identifier>DOI: 10.1007/s11661-011-0665-4</identifier><identifier>CODEN: MMTAEB</identifier><language>eng</language><publisher>Boston: Springer US</publisher><subject>Applied sciences ; Bainitic steel ; Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Exact sciences and technology ; Fracture mechanics ; Fracture toughness ; Fractures ; Heat affected zone ; Joining, thermal cutting: metallurgical aspects ; Materials Science ; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology ; Metallic Materials ; Metals. Metallurgy ; Microstructure ; Nanotechnology ; Parents ; Rail steels ; Steel ; Structural Materials ; Structural steels ; Surfaces and Interfaces ; Thin Films ; Welded joints ; Welding</subject><ispartof>Metallurgical and materials transactions. A, Physical metallurgy and materials science, 2011-09, Vol.42 (9), p.2706-2715</ispartof><rights>The Minerals, Metals & Materials Society and ASM International 2011</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c377t-d03387da7ccadcae273d3c2676a63adfb43f6acd5e97bb109b0c5c5ea0cfb9863</citedby><cites>FETCH-LOGICAL-c377t-d03387da7ccadcae273d3c2676a63adfb43f6acd5e97bb109b0c5c5ea0cfb9863</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11661-011-0665-4$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11661-011-0665-4$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27923,27924,41487,42556,51318</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24408192$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Allie, Aldinton</creatorcontrib><creatorcontrib>Aglan, Heshmat</creatorcontrib><creatorcontrib>Fateh, Mahmood</creatorcontrib><title>Microstructure-Fracture Behavior Relationships of Slot-Welded Rail Steels</title><title>Metallurgical and materials transactions. A, Physical metallurgy and materials science</title><addtitle>Metall Mater Trans A</addtitle><description>Microstructural analyses of the parent pearlitic and bainitic rail steels were performed, and the results were compared with the microstructure of the welded pearlitic and bainitic steels. An increase in the ASTM grain size number of the heat-affected zone (HAZ) for both pearlitic and bainitic slot welds was observed. The microstructural features that were identified in the weldment of both slot-welded steels were very similar. This was expected since the same welding wire was used to weld both rail steels. The weld consisted of mainly ferrite and had similar grain size. The fusion zones of the welded pearlitic and bainitic rail steels were examined after flexural tests to determine if there were any cracks present due to improper or weak fusion. Examination of the entire fusion zone under high optical magnification revealed no cracks, indicating that a perfect fusion was achieved. The three-point flexural behavior of the parent pearlitic and bainitic steels was evaluated and compared with that of the slot-welded steels. It was found that that the welded pearlitic steel has superior fracture resistance properties when compared to the parent pearlitic steel. The average fracture resistance of the parent pearlitic steel was 79 MPa√m compared to 119 MPa√m for the welded pearlitic steel. The slot-welded bainitic steel, however, showed similar fracture resistance properties to the parent bainitic steel with average values of 121 and 128 MPa√m, respectively. The failure mechanism of the welded and parent pearlitic and bainitic steels was also identified. Microvoid coalescence was observed in both welded rail steel samples. This was manifested by dimpled features, which are associated with ductile failure.</description><subject>Applied sciences</subject><subject>Bainitic steel</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemistry and Materials Science</subject><subject>Exact sciences and technology</subject><subject>Fracture mechanics</subject><subject>Fracture toughness</subject><subject>Fractures</subject><subject>Heat affected zone</subject><subject>Joining, thermal cutting: metallurgical aspects</subject><subject>Materials Science</subject><subject>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</subject><subject>Metallic Materials</subject><subject>Metals. Metallurgy</subject><subject>Microstructure</subject><subject>Nanotechnology</subject><subject>Parents</subject><subject>Rail steels</subject><subject>Steel</subject><subject>Structural Materials</subject><subject>Structural steels</subject><subject>Surfaces and Interfaces</subject><subject>Thin Films</subject><subject>Welded joints</subject><subject>Welding</subject><issn>1073-5623</issn><issn>1543-1940</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp1kN9LwzAQx4soOKd_gG9FEJ-i-dWkfVRxOpgIm-JjuCap68jambSC_72pGwqCD8cd3Oe-HJ8kOSX4kmAsrwIhQhCESSwhMsT3khHJOEOk4Hg_zlgylAnKDpOjEFYYY1IwMUqmj7X2beh8r7veWzTx8D2kN3YJH3Xr07l10NVtE5b1JqRtlS5c26FX64w16Rxqly46a104Tg4qcMGe7Po4eZncPd8-oNnT_fT2eoY0k7JDBjOWSwNSazAaLJXMME2FFCAYmKrkrBKgTWYLWZYEFyXWmc4sYF2VRS7YOLnY5m58-97b0Kl1HbR1Dhrb9kEVVDDGuCCRPPtDrtreN_E5lctC5JRjGiGyhQYNwdtKbXy9Bv-pCFaDWrVVq6JaNahVPN6c74IhaHCVh0bX4eeQco5zUgzZdMuFuGrerP994P_wL7HXiVU</recordid><startdate>20110901</startdate><enddate>20110901</enddate><creator>Allie, Aldinton</creator><creator>Aglan, Heshmat</creator><creator>Fateh, Mahmood</creator><general>Springer US</general><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>4T-</scope><scope>4U-</scope><scope>7SR</scope><scope>7XB</scope><scope>88I</scope><scope>8AF</scope><scope>8AO</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>L6V</scope><scope>M2O</scope><scope>M2P</scope><scope>M7S</scope><scope>MBDVC</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>Q9U</scope><scope>S0X</scope></search><sort><creationdate>20110901</creationdate><title>Microstructure-Fracture Behavior Relationships of Slot-Welded Rail Steels</title><author>Allie, Aldinton ; Aglan, Heshmat ; Fateh, Mahmood</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c377t-d03387da7ccadcae273d3c2676a63adfb43f6acd5e97bb109b0c5c5ea0cfb9863</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Applied sciences</topic><topic>Bainitic steel</topic><topic>Characterization and Evaluation of Materials</topic><topic>Chemistry and Materials Science</topic><topic>Exact sciences and technology</topic><topic>Fracture mechanics</topic><topic>Fracture toughness</topic><topic>Fractures</topic><topic>Heat affected zone</topic><topic>Joining, thermal cutting: metallurgical aspects</topic><topic>Materials Science</topic><topic>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</topic><topic>Metallic Materials</topic><topic>Metals. Metallurgy</topic><topic>Microstructure</topic><topic>Nanotechnology</topic><topic>Parents</topic><topic>Rail steels</topic><topic>Steel</topic><topic>Structural Materials</topic><topic>Structural steels</topic><topic>Surfaces and Interfaces</topic><topic>Thin Films</topic><topic>Welded joints</topic><topic>Welding</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Allie, Aldinton</creatorcontrib><creatorcontrib>Aglan, Heshmat</creatorcontrib><creatorcontrib>Fateh, Mahmood</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Docstoc</collection><collection>University Readers</collection><collection>Engineered Materials Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>ProQuest Pharma Collection</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>ProQuest Engineering Collection</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Engineering Database</collection><collection>Research Library (Corporate)</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>ProQuest Central Basic</collection><collection>SIRS Editorial</collection><jtitle>Metallurgical and materials transactions. A, Physical metallurgy and materials science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Allie, Aldinton</au><au>Aglan, Heshmat</au><au>Fateh, Mahmood</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microstructure-Fracture Behavior Relationships of Slot-Welded Rail Steels</atitle><jtitle>Metallurgical and materials transactions. A, Physical metallurgy and materials science</jtitle><stitle>Metall Mater Trans A</stitle><date>2011-09-01</date><risdate>2011</risdate><volume>42</volume><issue>9</issue><spage>2706</spage><epage>2715</epage><pages>2706-2715</pages><issn>1073-5623</issn><eissn>1543-1940</eissn><coden>MMTAEB</coden><abstract>Microstructural analyses of the parent pearlitic and bainitic rail steels were performed, and the results were compared with the microstructure of the welded pearlitic and bainitic steels. An increase in the ASTM grain size number of the heat-affected zone (HAZ) for both pearlitic and bainitic slot welds was observed. The microstructural features that were identified in the weldment of both slot-welded steels were very similar. This was expected since the same welding wire was used to weld both rail steels. The weld consisted of mainly ferrite and had similar grain size. The fusion zones of the welded pearlitic and bainitic rail steels were examined after flexural tests to determine if there were any cracks present due to improper or weak fusion. Examination of the entire fusion zone under high optical magnification revealed no cracks, indicating that a perfect fusion was achieved. The three-point flexural behavior of the parent pearlitic and bainitic steels was evaluated and compared with that of the slot-welded steels. It was found that that the welded pearlitic steel has superior fracture resistance properties when compared to the parent pearlitic steel. The average fracture resistance of the parent pearlitic steel was 79 MPa√m compared to 119 MPa√m for the welded pearlitic steel. The slot-welded bainitic steel, however, showed similar fracture resistance properties to the parent bainitic steel with average values of 121 and 128 MPa√m, respectively. The failure mechanism of the welded and parent pearlitic and bainitic steels was also identified. Microvoid coalescence was observed in both welded rail steel samples. This was manifested by dimpled features, which are associated with ductile failure.</abstract><cop>Boston</cop><pub>Springer US</pub><doi>10.1007/s11661-011-0665-4</doi><tpages>10</tpages></addata></record> |
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| subjects | Applied sciences Bainitic steel Characterization and Evaluation of Materials Chemistry and Materials Science Exact sciences and technology Fracture mechanics Fracture toughness Fractures Heat affected zone Joining, thermal cutting: metallurgical aspects Materials Science Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metallic Materials Metals. Metallurgy Microstructure Nanotechnology Parents Rail steels Steel Structural Materials Structural steels Surfaces and Interfaces Thin Films Welded joints Welding |
| title | Microstructure-Fracture Behavior Relationships of Slot-Welded Rail Steels |
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