Microstructure, microstructural stability and mechanical properties of sand-cast Mg–4Al–4RE alloy
This paper presents a methodology for assessing the phase composition and the results of structural stability tests of the sand-cast Mg–4Al–4RE alloy after annealing it at 175 and 250°C for 3000h. The microstructure was analyzed with optical, scanning electron, and transmission electron microscopy....
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| Veröffentlicht in: | Materials characterization 2013-09, Vol.83, p.21-34 |
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| creator | RZYCHON, Tomasz KIELBUS, Andrzej LITYNSKA-DOBRZYNSKA, Lidia |
| description | This paper presents a methodology for assessing the phase composition and the results of structural stability tests of the sand-cast Mg–4Al–4RE alloy after annealing it at 175 and 250°C for 3000h. The microstructure was analyzed with optical, scanning electron, and transmission electron microscopy. The phase composition was determined with X-ray diffraction. The structure of the Mg–4Al–4RE (AE44) alloy is composed of large grains of α-Mg solid solution, needle-shaped precipitates of the Al11RE3phase, polyhedral precipitates of the Al2RE phase and Al10RE2Mn7 phase. After annealing at 175°C for 3000h, no changes in the alloy structure are observed, whereas after annealing at 250°C the precipitates of the Al11RE3 phase are found to be in the initial stages of spheroidization. The coarse-grained structure and unfavorable morphology of the intermetallic phases in the sand-cast AE44 alloy, which are caused by low solidification rates, result in low creep resistance up to 200°C and low mechanical properties at ambient temperature and at 175°C.
•Complement the knowledge about the microstructure of Mg-Al-RE alloys.•Clarify the mechanism of formation of Mg17Al12 phase above 180°C.•Applying a chemical dissolution of the α-Mg in order to phase identification.•Applying a statistical test to assess the spheroidization of precipitates.•Quantitative description of microstructure of Mg-Al-RE alloys. |
| doi_str_mv | 10.1016/j.matchar.2013.06.001 |
| format | Article |
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•Complement the knowledge about the microstructure of Mg-Al-RE alloys.•Clarify the mechanism of formation of Mg17Al12 phase above 180°C.•Applying a chemical dissolution of the α-Mg in order to phase identification.•Applying a statistical test to assess the spheroidization of precipitates.•Quantitative description of microstructure of Mg-Al-RE alloys.</description><identifier>ISSN: 1044-5803</identifier><identifier>EISSN: 1873-4189</identifier><identifier>DOI: 10.1016/j.matchar.2013.06.001</identifier><language>eng</language><publisher>New York, NY: Elsevier Inc</publisher><subject>Annealing ; Applied sciences ; CREEP ; Creep properties ; Cross-disciplinary physics: materials science; rheology ; Exact sciences and technology ; MAGNESIUM ALLOYS ; Magnesium base alloys ; MATERIALS SCIENCE ; Mechanical properties ; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology ; METALLOGRAPHY ; Metals. Metallurgy ; Mg–4Al–4RE magnesium alloy ; Microstructural stability ; MICROSTRUCTURE ; Phase composition ; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations ; Physics ; Precipitates ; PRECIPITATION ; Quantitative metallography ; SAND ; SOLID SOLUTIONS ; SOLIDIFICATION ; Spheroidizing ; STABILITY ; TRANSMISSION ELECTRON MICROSCOPY ; X-RAY DIFFRACTION</subject><ispartof>Materials characterization, 2013-09, Vol.83, p.21-34</ispartof><rights>2013 Elsevier Inc.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c400t-56de48e5dd5a5f4753472c9f672e51d793b8fcbcb9bf2314e06f9bde4f0eeac23</citedby><cites>FETCH-LOGICAL-c400t-56de48e5dd5a5f4753472c9f672e51d793b8fcbcb9bf2314e06f9bde4f0eeac23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S1044580313001721$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,776,780,881,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27734213$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/22285074$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>RZYCHON, Tomasz</creatorcontrib><creatorcontrib>KIELBUS, Andrzej</creatorcontrib><creatorcontrib>LITYNSKA-DOBRZYNSKA, Lidia</creatorcontrib><title>Microstructure, microstructural stability and mechanical properties of sand-cast Mg–4Al–4RE alloy</title><title>Materials characterization</title><description>This paper presents a methodology for assessing the phase composition and the results of structural stability tests of the sand-cast Mg–4Al–4RE alloy after annealing it at 175 and 250°C for 3000h. The microstructure was analyzed with optical, scanning electron, and transmission electron microscopy. The phase composition was determined with X-ray diffraction. The structure of the Mg–4Al–4RE (AE44) alloy is composed of large grains of α-Mg solid solution, needle-shaped precipitates of the Al11RE3phase, polyhedral precipitates of the Al2RE phase and Al10RE2Mn7 phase. After annealing at 175°C for 3000h, no changes in the alloy structure are observed, whereas after annealing at 250°C the precipitates of the Al11RE3 phase are found to be in the initial stages of spheroidization. The coarse-grained structure and unfavorable morphology of the intermetallic phases in the sand-cast AE44 alloy, which are caused by low solidification rates, result in low creep resistance up to 200°C and low mechanical properties at ambient temperature and at 175°C.
•Complement the knowledge about the microstructure of Mg-Al-RE alloys.•Clarify the mechanism of formation of Mg17Al12 phase above 180°C.•Applying a chemical dissolution of the α-Mg in order to phase identification.•Applying a statistical test to assess the spheroidization of precipitates.•Quantitative description of microstructure of Mg-Al-RE alloys.</description><subject>Annealing</subject><subject>Applied sciences</subject><subject>CREEP</subject><subject>Creep properties</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Exact sciences and technology</subject><subject>MAGNESIUM ALLOYS</subject><subject>Magnesium base alloys</subject><subject>MATERIALS SCIENCE</subject><subject>Mechanical properties</subject><subject>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</subject><subject>METALLOGRAPHY</subject><subject>Metals. Metallurgy</subject><subject>Mg–4Al–4RE magnesium alloy</subject><subject>Microstructural stability</subject><subject>MICROSTRUCTURE</subject><subject>Phase composition</subject><subject>Phase diagrams and microstructures developed by solidification and solid-solid phase transformations</subject><subject>Physics</subject><subject>Precipitates</subject><subject>PRECIPITATION</subject><subject>Quantitative metallography</subject><subject>SAND</subject><subject>SOLID SOLUTIONS</subject><subject>SOLIDIFICATION</subject><subject>Spheroidizing</subject><subject>STABILITY</subject><subject>TRANSMISSION ELECTRON MICROSCOPY</subject><subject>X-RAY DIFFRACTION</subject><issn>1044-5803</issn><issn>1873-4189</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqFkMtq3DAUQE1JoUnaTygYSiGL2Ll626sSQh6FhEBo10KWr1oNfkwlTWB2-Yf8Yb4kMjOU7LLRg3vu6xTFVwI1ASLPVvVokv1rQk2BsBpkDUA-FIekUazipGkP8hs4r0QD7FNxFOMKAGRD1GGBd96GOaawsWkT8LQc3_7NUMZkOj_4tC3N1Jcj5j6TtzmwDvMaQ_IYy9mVMUcra2Iq7_68PD3z82E5Hy5LMwzz9nPx0Zkh4pf9fVz8vrr8dXFT3d5f_7w4v60sB0iVkD3yBkXfCyMcV4JxRW3rpKIoSK9a1jXOdrZrO0cZ4QjStV3OcYBoLGXHxbdd3byB19H6lOe18zShTZpS2ghQPFMnOyqv8G-DMenRR4vDYCacN1ETyTMqOaiMih26SIkBnV4HP5qw1QT0Il-v9F6-XuRrkDrLz3nf9y1MzLJcMJP18X8yVYpxSljmfuw4zFYePYZlaJws9j4sM_ezf6fTK5cEoDE</recordid><startdate>20130901</startdate><enddate>20130901</enddate><creator>RZYCHON, Tomasz</creator><creator>KIELBUS, Andrzej</creator><creator>LITYNSKA-DOBRZYNSKA, Lidia</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>OTOTI</scope></search><sort><creationdate>20130901</creationdate><title>Microstructure, microstructural stability and mechanical properties of sand-cast Mg–4Al–4RE alloy</title><author>RZYCHON, Tomasz ; KIELBUS, Andrzej ; LITYNSKA-DOBRZYNSKA, Lidia</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c400t-56de48e5dd5a5f4753472c9f672e51d793b8fcbcb9bf2314e06f9bde4f0eeac23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Annealing</topic><topic>Applied sciences</topic><topic>CREEP</topic><topic>Creep properties</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Exact sciences and technology</topic><topic>MAGNESIUM ALLOYS</topic><topic>Magnesium base alloys</topic><topic>MATERIALS SCIENCE</topic><topic>Mechanical properties</topic><topic>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</topic><topic>METALLOGRAPHY</topic><topic>Metals. Metallurgy</topic><topic>Mg–4Al–4RE magnesium alloy</topic><topic>Microstructural stability</topic><topic>MICROSTRUCTURE</topic><topic>Phase composition</topic><topic>Phase diagrams and microstructures developed by solidification and solid-solid phase transformations</topic><topic>Physics</topic><topic>Precipitates</topic><topic>PRECIPITATION</topic><topic>Quantitative metallography</topic><topic>SAND</topic><topic>SOLID SOLUTIONS</topic><topic>SOLIDIFICATION</topic><topic>Spheroidizing</topic><topic>STABILITY</topic><topic>TRANSMISSION ELECTRON MICROSCOPY</topic><topic>X-RAY DIFFRACTION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>RZYCHON, Tomasz</creatorcontrib><creatorcontrib>KIELBUS, Andrzej</creatorcontrib><creatorcontrib>LITYNSKA-DOBRZYNSKA, Lidia</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>OSTI.GOV</collection><jtitle>Materials characterization</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>RZYCHON, Tomasz</au><au>KIELBUS, Andrzej</au><au>LITYNSKA-DOBRZYNSKA, Lidia</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Microstructure, microstructural stability and mechanical properties of sand-cast Mg–4Al–4RE alloy</atitle><jtitle>Materials characterization</jtitle><date>2013-09-01</date><risdate>2013</risdate><volume>83</volume><spage>21</spage><epage>34</epage><pages>21-34</pages><issn>1044-5803</issn><eissn>1873-4189</eissn><abstract>This paper presents a methodology for assessing the phase composition and the results of structural stability tests of the sand-cast Mg–4Al–4RE alloy after annealing it at 175 and 250°C for 3000h. The microstructure was analyzed with optical, scanning electron, and transmission electron microscopy. The phase composition was determined with X-ray diffraction. The structure of the Mg–4Al–4RE (AE44) alloy is composed of large grains of α-Mg solid solution, needle-shaped precipitates of the Al11RE3phase, polyhedral precipitates of the Al2RE phase and Al10RE2Mn7 phase. After annealing at 175°C for 3000h, no changes in the alloy structure are observed, whereas after annealing at 250°C the precipitates of the Al11RE3 phase are found to be in the initial stages of spheroidization. The coarse-grained structure and unfavorable morphology of the intermetallic phases in the sand-cast AE44 alloy, which are caused by low solidification rates, result in low creep resistance up to 200°C and low mechanical properties at ambient temperature and at 175°C.
•Complement the knowledge about the microstructure of Mg-Al-RE alloys.•Clarify the mechanism of formation of Mg17Al12 phase above 180°C.•Applying a chemical dissolution of the α-Mg in order to phase identification.•Applying a statistical test to assess the spheroidization of precipitates.•Quantitative description of microstructure of Mg-Al-RE alloys.</abstract><cop>New York, NY</cop><pub>Elsevier Inc</pub><doi>10.1016/j.matchar.2013.06.001</doi><tpages>14</tpages></addata></record> |
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| subjects | Annealing Applied sciences CREEP Creep properties Cross-disciplinary physics: materials science rheology Exact sciences and technology MAGNESIUM ALLOYS Magnesium base alloys MATERIALS SCIENCE Mechanical properties Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology METALLOGRAPHY Metals. Metallurgy Mg–4Al–4RE magnesium alloy Microstructural stability MICROSTRUCTURE Phase composition Phase diagrams and microstructures developed by solidification and solid-solid phase transformations Physics Precipitates PRECIPITATION Quantitative metallography SAND SOLID SOLUTIONS SOLIDIFICATION Spheroidizing STABILITY TRANSMISSION ELECTRON MICROSCOPY X-RAY DIFFRACTION |
| title | Microstructure, microstructural stability and mechanical properties of sand-cast Mg–4Al–4RE alloy |
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