Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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A Study on Hydrogen Embrittlement Research on Automotive Steel Sheets

자동차 강재의 수소취성 연구에 대한 고찰

  • Yang, Won Seog (Surface Coating Development Team, R&D Division of Hyundai Steel) ;
  • Seo, Ji Won (Accelerated Durability Development Team, Hyundai Motor R&D Center) ;
  • Ahn, Seung Ho (Accelerated Durability Development Team, Hyundai Motor R&D Center)
  • 양원석 (현대제철 연구개발본부 도금강판개발팀) ;
  • 서지원 (현대자동차 남양연구소 가속내구개발팀) ;
  • 안승호 (현대자동차 남양연구소 가속내구개발팀)
  • Received : 2018.08.16
  • Accepted : 2018.08.23
  • Published : 2018.08.30
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Abstract

In order to suppress $CO_2$ emission and protect passengers in case of vehicle collision, continuous efforts are being made to increase the application ratio and tensile strength of advanced high strength steels used in the manufacturing of automotive body. Simultaneously, hydrogen embrittlement which was not a concern in the past has currently become a major issue due to microstructure that is sensitive to hydrogen uptake. The sensitivity increases with residual stress and hydrogen uptake content. Many automotive OEM companies and mill makers are setting specifications to control hydrogen embrittlement. The factors which lead to hydrogen embrittlement are material sensitivity, residual stress, and hydrogen concentration; researches are in progress to develop countermeasures. To reduce material sensitivity, mill makers add high energy trap elements or microstructure refinement elements. Automotive OEM companies design the car parts not to concentrate local stress. And they manage the levels to not to exceed critical hydrogen concentration. In this article, we have reviewed hydrogen embrittlement evaluation methods and corresponding solutions that are being studied in automobile manufacturing industries and mill makers.

Keywords

References

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