Effect of Sulphur Content on Delayed Fracture Susceptibility of High Strength Steel for Bolts
A study has been made on the eject of sulphur content on the tempering behaviour and the delayed fracture susceptibility of high strength steels for bolts at a strength level of 130kgf/mm2. By means of the bending type testing, it was confirmed that the delayed fracture resistance improves with decr...
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| Veröffentlicht in: | Transactions of the Iron and Steel Institute of Japan 1984, Vol.24(7), pp.566-572 |
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| container_title | Transactions of the Iron and Steel Institute of Japan |
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| creator | NAMIKI, Kunio ISOKAWA, Kenji |
| description | A study has been made on the eject of sulphur content on the tempering behaviour and the delayed fracture susceptibility of high strength steels for bolts at a strength level of 130kgf/mm2. By means of the bending type testing, it was confirmed that the delayed fracture resistance improves with decrease of sulphur content. Fracture modes of delayed fracture specimens of 0.015 and 0.024% S steels exhibit intergranular ones, and sulphur segregation to prior austenite grain boundaries are detected by Auger electron spectroscopy, while 0.003% S steel shows transgranular fracture. On the other hand, Charpy impact fracture modes are all transgranular, regardless of sulphur contents. Accordingly, it is concluded that the intergranular fracture in delayed fracture is induced by both the sulphur segregation to prior austenite grain boundaries and the hydrogen introduction. Further study indicates that the increased resistance to delayed fracture of low sulphur steel is caused mainly by the prolonged incubation period to slow crack initiation. |
| doi_str_mv | 10.2355/isijinternational1966.24.566 |
| format | Article |
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By means of the bending type testing, it was confirmed that the delayed fracture resistance improves with decrease of sulphur content. Fracture modes of delayed fracture specimens of 0.015 and 0.024% S steels exhibit intergranular ones, and sulphur segregation to prior austenite grain boundaries are detected by Auger electron spectroscopy, while 0.003% S steel shows transgranular fracture. On the other hand, Charpy impact fracture modes are all transgranular, regardless of sulphur contents. Accordingly, it is concluded that the intergranular fracture in delayed fracture is induced by both the sulphur segregation to prior austenite grain boundaries and the hydrogen introduction. Further study indicates that the increased resistance to delayed fracture of low sulphur steel is caused mainly by the prolonged incubation period to slow crack initiation.</description><identifier>ISSN: 0021-1583</identifier><identifier>EISSN: 1881-1183</identifier><identifier>DOI: 10.2355/isijinternational1966.24.566</identifier><language>eng</language><publisher>Tokyo: The Iron and Steel Institute of Japan</publisher><subject>Applied sciences ; Cross-disciplinary physics: materials science; rheology ; Exact sciences and technology ; Fractures ; Materials science ; Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology ; Metals, semimetals and alloys ; Metals. 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Further study indicates that the increased resistance to delayed fracture of low sulphur steel is caused mainly by the prolonged incubation period to slow crack initiation.</description><subject>Applied sciences</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Exact sciences and technology</subject><subject>Fractures</subject><subject>Materials science</subject><subject>Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology</subject><subject>Metals, semimetals and alloys</subject><subject>Metals. 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Rheology. Fracture mechanics. Tribology</topic><topic>Metals, semimetals and alloys</topic><topic>Metals. Metallurgy</topic><topic>Other mechanical properties</topic><topic>Physics</topic><topic>Specific materials</topic><toplevel>online_resources</toplevel><creatorcontrib>NAMIKI, Kunio</creatorcontrib><creatorcontrib>ISOKAWA, Kenji</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Transactions of the Iron and Steel Institute of Japan</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>NAMIKI, Kunio</au><au>ISOKAWA, Kenji</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of Sulphur Content on Delayed Fracture Susceptibility of High Strength Steel for Bolts</atitle><jtitle>Transactions of the Iron and Steel Institute of Japan</jtitle><addtitle>ISIJ Int.</addtitle><date>1984-01-01</date><risdate>1984</risdate><volume>24</volume><issue>7</issue><spage>566</spage><epage>572</epage><pages>566-572</pages><issn>0021-1583</issn><eissn>1881-1183</eissn><abstract>A study has been made on the eject of sulphur content on the tempering behaviour and the delayed fracture susceptibility of high strength steels for bolts at a strength level of 130kgf/mm2. By means of the bending type testing, it was confirmed that the delayed fracture resistance improves with decrease of sulphur content. Fracture modes of delayed fracture specimens of 0.015 and 0.024% S steels exhibit intergranular ones, and sulphur segregation to prior austenite grain boundaries are detected by Auger electron spectroscopy, while 0.003% S steel shows transgranular fracture. On the other hand, Charpy impact fracture modes are all transgranular, regardless of sulphur contents. Accordingly, it is concluded that the intergranular fracture in delayed fracture is induced by both the sulphur segregation to prior austenite grain boundaries and the hydrogen introduction. Further study indicates that the increased resistance to delayed fracture of low sulphur steel is caused mainly by the prolonged incubation period to slow crack initiation.</abstract><cop>Tokyo</cop><pub>The Iron and Steel Institute of Japan</pub><doi>10.2355/isijinternational1966.24.566</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 0021-1583 |
| ispartof | Transactions of the Iron and Steel Institute of Japan, 1984, Vol.24(7), pp.566-572 |
| issn | 0021-1583 1881-1183 |
| language | eng |
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| source | Full-Text Journals in Chemistry (Open access); J-STAGE日本語サイト (Free Access); EZB Electronic Journals Library |
| subjects | Applied sciences Cross-disciplinary physics: materials science rheology Exact sciences and technology Fractures Materials science Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals, semimetals and alloys Metals. Metallurgy Other mechanical properties Physics Specific materials |
| title | Effect of Sulphur Content on Delayed Fracture Susceptibility of High Strength Steel for Bolts |
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