Adverse effects of Ni on the mechanical and corrosion-induced hydrogen embrittlement properties of ultra-strong giga steel used for automotive applications
Previous metallurgical studies have reported the beneficial effects of Ni addition to steels. In this study, however, the mechanical and corrosion-induced hydrogen embrittlement (CIHE) properties of medium C-based ultra-strong steel degraded with increasing Ni content. Steel samples with a higher Ni...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-08-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127520304111 |
| _version_ | 1819230648713347072 |
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| author | Jin Sung Park Hwang Goo Seong Joongki Hwang Sung Jin Kim |
| author_facet | Jin Sung Park Hwang Goo Seong Joongki Hwang Sung Jin Kim |
| author_sort | Jin Sung Park |
| collection | DOAJ |
| description | Previous metallurgical studies have reported the beneficial effects of Ni addition to steels. In this study, however, the mechanical and corrosion-induced hydrogen embrittlement (CIHE) properties of medium C-based ultra-strong steel degraded with increasing Ni content. Steel samples with a higher Ni content had a higher fraction of undissolved cementite (Fe3C) in the martensite matrix, leading to a smaller prior-γ grain size and lattice parameter, and a lower tensile strength. Even at a higher austenitizing temperature, no significant change in the tensile strength of the sample with a higher Ni content was observed. This was attributed to the additional supply of C atoms into the lattice by the further dissolution of Fe3C. The tensile test at a slow strain rate did not reveal a proportional relationship between the Ni content and the CIHE indices, but an inflection point of the Ni quantity in the steel was noted. Based on the results, effective metallurgical strategies with respect to the optimal Ni contents and austenitizing conditions for the steel are proposed. |
| first_indexed | 2024-12-23T11:32:25Z |
| format | Article |
| id | doaj.art-4e2ed870e9d24ad7a28e3521c6354e3f |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-12-23T11:32:25Z |
| publishDate | 2020-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-4e2ed870e9d24ad7a28e3521c6354e3f2022-12-21T17:48:46ZengElsevierMaterials & Design0264-12752020-08-01193108877Adverse effects of Ni on the mechanical and corrosion-induced hydrogen embrittlement properties of ultra-strong giga steel used for automotive applicationsJin Sung Park0Hwang Goo Seong1Joongki Hwang2Sung Jin Kim3Department of Advanced Materials Engineering, Sunchon National University Jungang-ro, Suncheon, Jeonnam 57922, Republic of KoreaPOSCO Technical Research Laboratories, Kumho-dong, Gwangyang, Jeonnam 57807, Republic of KoreaDepartment of Mechanical Engineering, Tongmyong University, Busan 48520, Republic of KoreaDepartment of Advanced Materials Engineering, Sunchon National University Jungang-ro, Suncheon, Jeonnam 57922, Republic of Korea; Corresponding author.Previous metallurgical studies have reported the beneficial effects of Ni addition to steels. In this study, however, the mechanical and corrosion-induced hydrogen embrittlement (CIHE) properties of medium C-based ultra-strong steel degraded with increasing Ni content. Steel samples with a higher Ni content had a higher fraction of undissolved cementite (Fe3C) in the martensite matrix, leading to a smaller prior-γ grain size and lattice parameter, and a lower tensile strength. Even at a higher austenitizing temperature, no significant change in the tensile strength of the sample with a higher Ni content was observed. This was attributed to the additional supply of C atoms into the lattice by the further dissolution of Fe3C. The tensile test at a slow strain rate did not reveal a proportional relationship between the Ni content and the CIHE indices, but an inflection point of the Ni quantity in the steel was noted. Based on the results, effective metallurgical strategies with respect to the optimal Ni contents and austenitizing conditions for the steel are proposed.http://www.sciencedirect.com/science/article/pii/S0264127520304111Ultra-strong steelNickelFe3CCorrosionHydrogen embrittlementAustenitizing |
| spellingShingle | Jin Sung Park Hwang Goo Seong Joongki Hwang Sung Jin Kim Adverse effects of Ni on the mechanical and corrosion-induced hydrogen embrittlement properties of ultra-strong giga steel used for automotive applications Materials & Design Ultra-strong steel Nickel Fe3C Corrosion Hydrogen embrittlement Austenitizing |
| title | Adverse effects of Ni on the mechanical and corrosion-induced hydrogen embrittlement properties of ultra-strong giga steel used for automotive applications |
| title_full | Adverse effects of Ni on the mechanical and corrosion-induced hydrogen embrittlement properties of ultra-strong giga steel used for automotive applications |
| title_fullStr | Adverse effects of Ni on the mechanical and corrosion-induced hydrogen embrittlement properties of ultra-strong giga steel used for automotive applications |
| title_full_unstemmed | Adverse effects of Ni on the mechanical and corrosion-induced hydrogen embrittlement properties of ultra-strong giga steel used for automotive applications |
| title_short | Adverse effects of Ni on the mechanical and corrosion-induced hydrogen embrittlement properties of ultra-strong giga steel used for automotive applications |
| title_sort | adverse effects of ni on the mechanical and corrosion induced hydrogen embrittlement properties of ultra strong giga steel used for automotive applications |
| topic | Ultra-strong steel Nickel Fe3C Corrosion Hydrogen embrittlement Austenitizing |
| url | http://www.sciencedirect.com/science/article/pii/S0264127520304111 |
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