Mechanism of serrated flow in a cast nickel base superalloy
•Serrated flow is observed during hot tensile deformation of alloy CM 247 EA LC.•In the investigated range 300–650°C, serrations were most prominent at 300°C.•In the serrated flow region strain rate sensitivity is observed to be negative.•Serrated flow and negative SRS is attributed to shearing of γ...
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| Veröffentlicht in: | Materials letters 2018-01, Vol.210, p.298-300 |
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| creator | Rai, R.K. Sahu, J.K. |
| description | •Serrated flow is observed during hot tensile deformation of alloy CM 247 EA LC.•In the investigated range 300–650°C, serrations were most prominent at 300°C.•In the serrated flow region strain rate sensitivity is observed to be negative.•Serrated flow and negative SRS is attributed to shearing of γ′ by superpartials.
Mechanism of serrated plastic flow in a cast nickel base superalloy was investigated in the temperature range of 25–850°C by conducting tensile tests employing strain rates of 1×10−3, 1×10−4 and 1×10−5s−1 and subsequent TEM studies. Shearing of γ′ precipitates by superpartials a/2[110] bounded by anti- phase boundaries are found to be responsible for the serrated yielding. |
| doi_str_mv | 10.1016/j.matlet.2017.09.053 |
| format | Article |
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Mechanism of serrated plastic flow in a cast nickel base superalloy was investigated in the temperature range of 25–850°C by conducting tensile tests employing strain rates of 1×10−3, 1×10−4 and 1×10−5s−1 and subsequent TEM studies. Shearing of γ′ precipitates by superpartials a/2[110] bounded by anti- phase boundaries are found to be responsible for the serrated yielding.</description><identifier>ISSN: 0167-577X</identifier><identifier>EISSN: 1873-4979</identifier><identifier>DOI: 10.1016/j.matlet.2017.09.053</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Antiphase boundaries ; Deformation and fracture ; Inverse PLC effect ; Materials science ; Microstructure ; Nickel ; Nickel base alloys ; Plastic flow ; Precipitates ; Serrated flow ; Serrated yielding ; Shearing ; Strain rate ; Superalloy ; Superalloys ; Superpartial ; Tensile tests</subject><ispartof>Materials letters, 2018-01, Vol.210, p.298-300</ispartof><rights>2017 Elsevier B.V.</rights><rights>Copyright Elsevier BV Jan 1, 2018</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c334t-5dfaf452e7583d5ac544ad48d10886ac379a5d7ee2c8202f8269b5417ba0e5e93</citedby><cites>FETCH-LOGICAL-c334t-5dfaf452e7583d5ac544ad48d10886ac379a5d7ee2c8202f8269b5417ba0e5e93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.matlet.2017.09.053$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,45974</link.rule.ids></links><search><creatorcontrib>Rai, R.K.</creatorcontrib><creatorcontrib>Sahu, J.K.</creatorcontrib><title>Mechanism of serrated flow in a cast nickel base superalloy</title><title>Materials letters</title><description>•Serrated flow is observed during hot tensile deformation of alloy CM 247 EA LC.•In the investigated range 300–650°C, serrations were most prominent at 300°C.•In the serrated flow region strain rate sensitivity is observed to be negative.•Serrated flow and negative SRS is attributed to shearing of γ′ by superpartials.
Mechanism of serrated plastic flow in a cast nickel base superalloy was investigated in the temperature range of 25–850°C by conducting tensile tests employing strain rates of 1×10−3, 1×10−4 and 1×10−5s−1 and subsequent TEM studies. Shearing of γ′ precipitates by superpartials a/2[110] bounded by anti- phase boundaries are found to be responsible for the serrated yielding.</description><subject>Antiphase boundaries</subject><subject>Deformation and fracture</subject><subject>Inverse PLC effect</subject><subject>Materials science</subject><subject>Microstructure</subject><subject>Nickel</subject><subject>Nickel base alloys</subject><subject>Plastic flow</subject><subject>Precipitates</subject><subject>Serrated flow</subject><subject>Serrated yielding</subject><subject>Shearing</subject><subject>Strain rate</subject><subject>Superalloy</subject><subject>Superalloys</subject><subject>Superpartial</subject><subject>Tensile tests</subject><issn>0167-577X</issn><issn>1873-4979</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp9kE1LxDAURYMoOI7-AxcB161JkzQJgiDiF4y4UXAX3iSvmNppx6SjzL-3w7h29Tbn3ss7hJxzVnLG68u2XMHY4VhWjOuS2ZIpcUBm3GhRSKvtIZlNmC6U1u_H5CTnljEmLZMzcvWM_gP6mFd0aGjGlGDEQJtu-KGxp0A95JH20X9iR5eQkebNGhN03bA9JUcNdBnP_u6cvN3fvd4-FouXh6fbm0XhhZBjoUIDjVQVamVEUOCVlBCkCZwZU4MX2oIKGrHypmJVY6raLpXkegkMFVoxJxf73nUavjaYR9cOm9RPk47bWgtlVC0mSu4pn4acEzZuneIK0tZx5naaXOv2mtxOk2PWTZqm2PU-htMH3xGTyz5i7zHEhH50YYj_F_wC06Zx8Q</recordid><startdate>20180101</startdate><enddate>20180101</enddate><creator>Rai, R.K.</creator><creator>Sahu, J.K.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20180101</creationdate><title>Mechanism of serrated flow in a cast nickel base superalloy</title><author>Rai, R.K. ; Sahu, J.K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-5dfaf452e7583d5ac544ad48d10886ac379a5d7ee2c8202f8269b5417ba0e5e93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Antiphase boundaries</topic><topic>Deformation and fracture</topic><topic>Inverse PLC effect</topic><topic>Materials science</topic><topic>Microstructure</topic><topic>Nickel</topic><topic>Nickel base alloys</topic><topic>Plastic flow</topic><topic>Precipitates</topic><topic>Serrated flow</topic><topic>Serrated yielding</topic><topic>Shearing</topic><topic>Strain rate</topic><topic>Superalloy</topic><topic>Superalloys</topic><topic>Superpartial</topic><topic>Tensile tests</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Rai, R.K.</creatorcontrib><creatorcontrib>Sahu, J.K.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Materials letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Rai, R.K.</au><au>Sahu, J.K.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Mechanism of serrated flow in a cast nickel base superalloy</atitle><jtitle>Materials letters</jtitle><date>2018-01-01</date><risdate>2018</risdate><volume>210</volume><spage>298</spage><epage>300</epage><pages>298-300</pages><issn>0167-577X</issn><eissn>1873-4979</eissn><abstract>•Serrated flow is observed during hot tensile deformation of alloy CM 247 EA LC.•In the investigated range 300–650°C, serrations were most prominent at 300°C.•In the serrated flow region strain rate sensitivity is observed to be negative.•Serrated flow and negative SRS is attributed to shearing of γ′ by superpartials.
Mechanism of serrated plastic flow in a cast nickel base superalloy was investigated in the temperature range of 25–850°C by conducting tensile tests employing strain rates of 1×10−3, 1×10−4 and 1×10−5s−1 and subsequent TEM studies. Shearing of γ′ precipitates by superpartials a/2[110] bounded by anti- phase boundaries are found to be responsible for the serrated yielding.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.matlet.2017.09.053</doi><tpages>3</tpages></addata></record> |
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| ispartof | Materials letters, 2018-01, Vol.210, p.298-300 |
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| source | Elsevier ScienceDirect Journals |
| subjects | Antiphase boundaries Deformation and fracture Inverse PLC effect Materials science Microstructure Nickel Nickel base alloys Plastic flow Precipitates Serrated flow Serrated yielding Shearing Strain rate Superalloy Superalloys Superpartial Tensile tests |
| title | Mechanism of serrated flow in a cast nickel base superalloy |
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