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Hydrogen Effect on the Deformation Behavior of Austenitic Stainless Steels Investigated by Nanoindentation

[+] Author Affiliations
Lin Zhang, Yuanjian Hong, Jinyang Zheng, Chengshuang Zhou

Zhejiang University of Technology, Hangzhou, China

Bai An

National Institute of Advanced Industrial Science and Technology, Tsukaba, Japan

Paper No. PVP2017-66185, pp. V06BT06A047; 9 pages
doi:10.1115/PVP2017-66185
From:
  • ASME 2017 Pressure Vessels and Piping Conference
  • Volume 6B: Materials and Fabrication
  • Waikoloa, Hawaii, USA, July 16–20, 2017
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5800-4
  • Copyright © 2017 by ASME

abstract

A full understanding of hydrogen effect on deformation is important to reveal the mechanism of hydrogen embrittlement. The effects of thermal gaseous hydrogen charging on 304 and 310S austenitic stainless steels have been examined by using nanoindentation. It is first found by using nanoindentation continuous stiffness measurement that hydrogen decreases the elastic modulus and increases the hardness in the initial stage of plastic deformation, while the hydrogen effect becomes weaker and remains nearly constant with further plastic deformation. Hydrogen increases the creep displacement in 310S steel, which indicates that hydrogen facilitates ambient creep. α′ martensite restrains the nanoindentation creep and hydrogen has little effect on the creep induced by α′ martensite.

Copyright © 2017 by ASME

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