Defect tolerance and hydrogen susceptibility of the fatigue limit of an additively manufactured Ni-based superalloy 718
•Fatigue strength properties of an additively-manufactured alloy 718.•Competition between defect size and grain size in determining the fatigue limit.•Successful evaluation of the defect tolerance as a small crack problem.•Experimental finding of the harmlessness of solute hydrogen on the fatigue li...
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Veröffentlicht in: | International journal of fatigue 2020-10, Vol.139, p.105740-10, Article 105740 |
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container_title | International journal of fatigue |
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creator | Kevinsanny Okazaki, Saburo Takakuwa, Osamu Ogawa, Yuhei Funakoshi, Yusuke Kawashima, Hideto Matsuoka, Saburo Matsunaga, Hisao |
description | •Fatigue strength properties of an additively-manufactured alloy 718.•Competition between defect size and grain size in determining the fatigue limit.•Successful evaluation of the defect tolerance as a small crack problem.•Experimental finding of the harmlessness of solute hydrogen on the fatigue limit.
The sensitivity of the fatigue limit of an additively manufactured, Ni-based superalloy 718 sample to surface finishing conditions and solute hydrogen was investigated via a series of tension–compression fatigue tests. The results revealed that neither defects nor hydrogen diminished the fatigue limit of the sample. The high defect tolerance of this material is attributed to a large unit of crack initiation in the coarse grain, which eclipses the detrimental effect of AM-process-induced defects. Also, from the results, it is inferred that hydrogen has little effect on the crack propagation rate and the crack growth threshold of the material. |
doi_str_mv | 10.1016/j.ijfatigue.2020.105740 |
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The sensitivity of the fatigue limit of an additively manufactured, Ni-based superalloy 718 sample to surface finishing conditions and solute hydrogen was investigated via a series of tension–compression fatigue tests. The results revealed that neither defects nor hydrogen diminished the fatigue limit of the sample. The high defect tolerance of this material is attributed to a large unit of crack initiation in the coarse grain, which eclipses the detrimental effect of AM-process-induced defects. Also, from the results, it is inferred that hydrogen has little effect on the crack propagation rate and the crack growth threshold of the material.</description><identifier>ISSN: 0142-1123</identifier><identifier>EISSN: 1879-3452</identifier><identifier>DOI: 10.1016/j.ijfatigue.2020.105740</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Additive manufacturing ; Alloy 718 ; Compression tests ; Crack initiation ; Crack propagation ; Crystal defects ; Defects ; Fatigue ; Fatigue limit ; Fatigue tests ; Hydrogen ; Hydrogen embrittlement ; Materials fatigue ; Nickel base alloys ; Superalloys ; Surface finishing</subject><ispartof>International journal of fatigue, 2020-10, Vol.139, p.105740-10, Article 105740</ispartof><rights>2020 Elsevier Ltd</rights><rights>Copyright Elsevier BV Oct 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c453t-b0a13f6c57f8b7d3591f449e31df9634be56c531693202fafbdc8ad5f877119f3</citedby><cites>FETCH-LOGICAL-c453t-b0a13f6c57f8b7d3591f449e31df9634be56c531693202fafbdc8ad5f877119f3</cites><orcidid>0000-0002-3500-500X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.ijfatigue.2020.105740$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids></links><search><creatorcontrib>Kevinsanny</creatorcontrib><creatorcontrib>Okazaki, Saburo</creatorcontrib><creatorcontrib>Takakuwa, Osamu</creatorcontrib><creatorcontrib>Ogawa, Yuhei</creatorcontrib><creatorcontrib>Funakoshi, Yusuke</creatorcontrib><creatorcontrib>Kawashima, Hideto</creatorcontrib><creatorcontrib>Matsuoka, Saburo</creatorcontrib><creatorcontrib>Matsunaga, Hisao</creatorcontrib><title>Defect tolerance and hydrogen susceptibility of the fatigue limit of an additively manufactured Ni-based superalloy 718</title><title>International journal of fatigue</title><description>•Fatigue strength properties of an additively-manufactured alloy 718.•Competition between defect size and grain size in determining the fatigue limit.•Successful evaluation of the defect tolerance as a small crack problem.•Experimental finding of the harmlessness of solute hydrogen on the fatigue limit.
The sensitivity of the fatigue limit of an additively manufactured, Ni-based superalloy 718 sample to surface finishing conditions and solute hydrogen was investigated via a series of tension–compression fatigue tests. The results revealed that neither defects nor hydrogen diminished the fatigue limit of the sample. The high defect tolerance of this material is attributed to a large unit of crack initiation in the coarse grain, which eclipses the detrimental effect of AM-process-induced defects. Also, from the results, it is inferred that hydrogen has little effect on the crack propagation rate and the crack growth threshold of the material.</description><subject>Additive manufacturing</subject><subject>Alloy 718</subject><subject>Compression tests</subject><subject>Crack initiation</subject><subject>Crack propagation</subject><subject>Crystal defects</subject><subject>Defects</subject><subject>Fatigue</subject><subject>Fatigue limit</subject><subject>Fatigue tests</subject><subject>Hydrogen</subject><subject>Hydrogen embrittlement</subject><subject>Materials fatigue</subject><subject>Nickel base alloys</subject><subject>Superalloys</subject><subject>Surface finishing</subject><issn>0142-1123</issn><issn>1879-3452</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkEGP2yAQhVG1lZrN9jcUac9OwYAxxyhtt5Wi7aV7RhiGBMuxs4BT-d-XKKte9zSjmXnvaT6EvlCyoYQ2X_tN6L3J4TDDpib1dSokJx_QirZSVYyL-g6tCOV1RWnNPqH7lHpCiCJSrNDfb-DBZpynAaIZLWAzOnxcXJwOMOI0JwvnHLowhLzgyeN8BPwWh4dwCvk6NCM2zoUcLjAs-GTG2Rub5wgOP4eqM6k0aT6XhGGYFixp-4A-ejMk-PxW1-jlx_c_u5_V_vfTr912X1kuWK46YijzjRXSt510TCjqOVfAqPOqYbwDUZaMNoqV373xnbOtccK3UlKqPFujx5vvOU6vM6Ss-2mOY4nUNedCNYIoWq7k7crGKaUIXp9jOJm4aEr0lbLu9X_K-kpZ3ygX5famhPLEJUDUyQYoHF2Ihat2U3jX4x8-yotx</recordid><startdate>20201001</startdate><enddate>20201001</enddate><creator>Kevinsanny</creator><creator>Okazaki, Saburo</creator><creator>Takakuwa, Osamu</creator><creator>Ogawa, Yuhei</creator><creator>Funakoshi, Yusuke</creator><creator>Kawashima, Hideto</creator><creator>Matsuoka, Saburo</creator><creator>Matsunaga, Hisao</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><orcidid>https://orcid.org/0000-0002-3500-500X</orcidid></search><sort><creationdate>20201001</creationdate><title>Defect tolerance and hydrogen susceptibility of the fatigue limit of an additively manufactured Ni-based superalloy 718</title><author>Kevinsanny ; Okazaki, Saburo ; Takakuwa, Osamu ; Ogawa, Yuhei ; Funakoshi, Yusuke ; Kawashima, Hideto ; Matsuoka, Saburo ; Matsunaga, Hisao</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c453t-b0a13f6c57f8b7d3591f449e31df9634be56c531693202fafbdc8ad5f877119f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Additive manufacturing</topic><topic>Alloy 718</topic><topic>Compression tests</topic><topic>Crack initiation</topic><topic>Crack propagation</topic><topic>Crystal defects</topic><topic>Defects</topic><topic>Fatigue</topic><topic>Fatigue limit</topic><topic>Fatigue tests</topic><topic>Hydrogen</topic><topic>Hydrogen embrittlement</topic><topic>Materials fatigue</topic><topic>Nickel base alloys</topic><topic>Superalloys</topic><topic>Surface finishing</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kevinsanny</creatorcontrib><creatorcontrib>Okazaki, Saburo</creatorcontrib><creatorcontrib>Takakuwa, Osamu</creatorcontrib><creatorcontrib>Ogawa, Yuhei</creatorcontrib><creatorcontrib>Funakoshi, Yusuke</creatorcontrib><creatorcontrib>Kawashima, Hideto</creatorcontrib><creatorcontrib>Matsuoka, Saburo</creatorcontrib><creatorcontrib>Matsunaga, Hisao</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>International journal of fatigue</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kevinsanny</au><au>Okazaki, Saburo</au><au>Takakuwa, Osamu</au><au>Ogawa, Yuhei</au><au>Funakoshi, Yusuke</au><au>Kawashima, Hideto</au><au>Matsuoka, Saburo</au><au>Matsunaga, Hisao</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Defect tolerance and hydrogen susceptibility of the fatigue limit of an additively manufactured Ni-based superalloy 718</atitle><jtitle>International journal of fatigue</jtitle><date>2020-10-01</date><risdate>2020</risdate><volume>139</volume><spage>105740</spage><epage>10</epage><pages>105740-10</pages><artnum>105740</artnum><issn>0142-1123</issn><eissn>1879-3452</eissn><abstract>•Fatigue strength properties of an additively-manufactured alloy 718.•Competition between defect size and grain size in determining the fatigue limit.•Successful evaluation of the defect tolerance as a small crack problem.•Experimental finding of the harmlessness of solute hydrogen on the fatigue limit.
The sensitivity of the fatigue limit of an additively manufactured, Ni-based superalloy 718 sample to surface finishing conditions and solute hydrogen was investigated via a series of tension–compression fatigue tests. The results revealed that neither defects nor hydrogen diminished the fatigue limit of the sample. The high defect tolerance of this material is attributed to a large unit of crack initiation in the coarse grain, which eclipses the detrimental effect of AM-process-induced defects. Also, from the results, it is inferred that hydrogen has little effect on the crack propagation rate and the crack growth threshold of the material.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.ijfatigue.2020.105740</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0002-3500-500X</orcidid></addata></record> |
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source | ScienceDirect Journals (5 years ago - present) |
subjects | Additive manufacturing Alloy 718 Compression tests Crack initiation Crack propagation Crystal defects Defects Fatigue Fatigue limit Fatigue tests Hydrogen Hydrogen embrittlement Materials fatigue Nickel base alloys Superalloys Surface finishing |
title | Defect tolerance and hydrogen susceptibility of the fatigue limit of an additively manufactured Ni-based superalloy 718 |
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