Relationship between hydrogen embrittlement and second-phase particles in a 7075 aluminum alloy
With respect to hydrogen embrittlement process in a 7075 alloy in humid air, it has been claimed that cracks at second-phase particles result in intergranular cracking. In this study, slow strain rate tensile tests in two environments and microscopic surface observation were carried out to investiga...
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Veröffentlicht in: | Journal of Japan Institute of Light Metals 2017/03/30, Vol.67(3), pp.67-71 |
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description | With respect to hydrogen embrittlement process in a 7075 alloy in humid air, it has been claimed that cracks at second-phase particles result in intergranular cracking. In this study, slow strain rate tensile tests in two environments and microscopic surface observation were carried out to investigate the hydrogen embrittlement process of a 7075 alloy. It was confirmed that elongation in humid air was smaller than in dry nitrogen gas due to hydrogen embrittlement. In both environments, cracks were observed in second-phase particles on the specimen surface during tensile deformation. The amount of cracks in second-phase particles was not larger in humid air than in dry nitrogen gas. Moreover, they did not grow into the aluminum matrix in both environments. Some intergranular cracks were observed on the specimen surface without a cracking of second-phase particles in humid air. Therefore, hydrogen embrittlement in a 7075 alloy based on intergranular cracking in humid air is not caused by a cracking of second-phase particles on the specimen surface. |
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In this study, slow strain rate tensile tests in two environments and microscopic surface observation were carried out to investigate the hydrogen embrittlement process of a 7075 alloy. It was confirmed that elongation in humid air was smaller than in dry nitrogen gas due to hydrogen embrittlement. In both environments, cracks were observed in second-phase particles on the specimen surface during tensile deformation. The amount of cracks in second-phase particles was not larger in humid air than in dry nitrogen gas. Moreover, they did not grow into the aluminum matrix in both environments. Some intergranular cracks were observed on the specimen surface without a cracking of second-phase particles in humid air. Therefore, hydrogen embrittlement in a 7075 alloy based on intergranular cracking in humid air is not caused by a cracking of second-phase particles on the specimen surface.</description><identifier>ISSN: 0451-5994</identifier><identifier>EISSN: 1880-8018</identifier><identifier>DOI: 10.2464/jilm.67.67</identifier><language>jpn</language><publisher>Tokyo: The Japan Institute of Light Metals</publisher><subject>7075 aluminum alloy ; Aluminum ; Aluminum base alloys ; Cracks ; Heat treating ; humid air ; Hydrogen ; Hydrogen embrittlement ; Nitrogen ; second-phase particle ; Slow strain rate ; slow strain rate tensile test ; Tensile deformation ; Tensile tests</subject><ispartof>Journal of Japan Institute of Light Metals, 2017/03/30, Vol.67(3), pp.67-71</ispartof><rights>2017 The Japan Institute of Light Metals</rights><rights>Copyright Japan Science and Technology Agency 2017</rights><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,1883,4024,27923,27924,27925</link.rule.ids></links><search><creatorcontrib>Manaka, Toshiaki</creatorcontrib><creatorcontrib>Itoh, Goroh</creatorcontrib><title>Relationship between hydrogen embrittlement and second-phase particles in a 7075 aluminum alloy</title><title>Journal of Japan Institute of Light Metals</title><addtitle>J. Japan Inst. Light Metals</addtitle><description>With respect to hydrogen embrittlement process in a 7075 alloy in humid air, it has been claimed that cracks at second-phase particles result in intergranular cracking. In this study, slow strain rate tensile tests in two environments and microscopic surface observation were carried out to investigate the hydrogen embrittlement process of a 7075 alloy. It was confirmed that elongation in humid air was smaller than in dry nitrogen gas due to hydrogen embrittlement. In both environments, cracks were observed in second-phase particles on the specimen surface during tensile deformation. The amount of cracks in second-phase particles was not larger in humid air than in dry nitrogen gas. Moreover, they did not grow into the aluminum matrix in both environments. Some intergranular cracks were observed on the specimen surface without a cracking of second-phase particles in humid air. Therefore, hydrogen embrittlement in a 7075 alloy based on intergranular cracking in humid air is not caused by a cracking of second-phase particles on the specimen surface.</description><subject>7075 aluminum alloy</subject><subject>Aluminum</subject><subject>Aluminum base alloys</subject><subject>Cracks</subject><subject>Heat treating</subject><subject>humid air</subject><subject>Hydrogen</subject><subject>Hydrogen embrittlement</subject><subject>Nitrogen</subject><subject>second-phase particle</subject><subject>Slow strain rate</subject><subject>slow strain rate tensile test</subject><subject>Tensile deformation</subject><subject>Tensile tests</subject><issn>0451-5994</issn><issn>1880-8018</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNo9UNtqwzAMNWODla0v-wLDntPZjm95LGU3KAzG9mycRGkcEiezHUb_fiktA0nngI50kBB6oGTDuORPneuHjVRLXKEV1ZpkmlB9jVaEC5qJouC3aB2jKwkjXLFC0BUyn9Db5EYfWzfhEtIvgMftsQ7jYSEwlMGl1MMAPmHraxyhGn2dTa2NgCcbkqt6iNh5bLEiSmDbz4Pz87CQfjzeo5vG9hHWF7xD3y_PX7u3bP_x-r7b7rOOCpmyhlle0JyWRKpCVIwCKwsqmJYWypyBVgIKQpgkuhFNTfWSJZNU6GWINiy_Q4_nvVMYf2aIyXTjHPxiaRihXGghcr6otmdVF5M9gJmCG2w4mssZ5vRBI5XJT0UqkhP636taGwz4_A9wzG1A</recordid><startdate>2017</startdate><enddate>2017</enddate><creator>Manaka, Toshiaki</creator><creator>Itoh, Goroh</creator><general>The Japan Institute of Light Metals</general><general>Japan Science and Technology Agency</general><scope>7QF</scope><scope>7TA</scope><scope>7TB</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>KR7</scope></search><sort><creationdate>2017</creationdate><title>Relationship between hydrogen embrittlement and second-phase particles in a 7075 aluminum alloy</title><author>Manaka, Toshiaki ; Itoh, Goroh</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-j156t-f2a49131b06795c21e2b915286aeb32e875e9002608f5fd18fd1b261581311f23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>jpn</language><creationdate>2017</creationdate><topic>7075 aluminum alloy</topic><topic>Aluminum</topic><topic>Aluminum base alloys</topic><topic>Cracks</topic><topic>Heat treating</topic><topic>humid air</topic><topic>Hydrogen</topic><topic>Hydrogen embrittlement</topic><topic>Nitrogen</topic><topic>second-phase particle</topic><topic>Slow strain rate</topic><topic>slow strain rate tensile test</topic><topic>Tensile deformation</topic><topic>Tensile tests</topic><toplevel>online_resources</toplevel><creatorcontrib>Manaka, Toshiaki</creatorcontrib><creatorcontrib>Itoh, Goroh</creatorcontrib><collection>Aluminium Industry Abstracts</collection><collection>Materials Business File</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>Journal of Japan Institute of Light Metals</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Manaka, Toshiaki</au><au>Itoh, Goroh</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Relationship between hydrogen embrittlement and second-phase particles in a 7075 aluminum alloy</atitle><jtitle>Journal of Japan Institute of Light Metals</jtitle><addtitle>J. Japan Inst. Light Metals</addtitle><date>2017</date><risdate>2017</risdate><volume>67</volume><issue>3</issue><spage>67</spage><epage>71</epage><pages>67-71</pages><issn>0451-5994</issn><eissn>1880-8018</eissn><abstract>With respect to hydrogen embrittlement process in a 7075 alloy in humid air, it has been claimed that cracks at second-phase particles result in intergranular cracking. In this study, slow strain rate tensile tests in two environments and microscopic surface observation were carried out to investigate the hydrogen embrittlement process of a 7075 alloy. It was confirmed that elongation in humid air was smaller than in dry nitrogen gas due to hydrogen embrittlement. In both environments, cracks were observed in second-phase particles on the specimen surface during tensile deformation. The amount of cracks in second-phase particles was not larger in humid air than in dry nitrogen gas. Moreover, they did not grow into the aluminum matrix in both environments. Some intergranular cracks were observed on the specimen surface without a cracking of second-phase particles in humid air. Therefore, hydrogen embrittlement in a 7075 alloy based on intergranular cracking in humid air is not caused by a cracking of second-phase particles on the specimen surface.</abstract><cop>Tokyo</cop><pub>The Japan Institute of Light Metals</pub><doi>10.2464/jilm.67.67</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
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subjects | 7075 aluminum alloy Aluminum Aluminum base alloys Cracks Heat treating humid air Hydrogen Hydrogen embrittlement Nitrogen second-phase particle Slow strain rate slow strain rate tensile test Tensile deformation Tensile tests |
title | Relationship between hydrogen embrittlement and second-phase particles in a 7075 aluminum alloy |
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