Hydrogen Embrittlement of CrCoNi Medium-Entropy Alloy with Millimeter-Scale Grain Size: An In Situ Hydrogen Charging Study-Reference-Cited by-同舟云学术

Hydrogen Embrittlement of CrCoNi Medium-Entropy Alloy with Millimeter-Scale Grain Size: An In Situ Hydrogen Charging Study

Published:2023-04-18 Issue:4 Volume:25 Page:673
ISSN:1099-4300
Container-title:Entropy
language:en
Short-container-title:Entropy

Author:

Yan Shaohua¹,He Xipei¹,Zhu Zhongyin²

Affiliation:

1. College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China

2. Engineering Training Center, Southwest Jiaotong University, Chengdu 610031, China

Abstract

In this study, we examined the effect of charging current density on the hydrogen embrittlement (HE) of MEA and the associated HE mechanisms using electron backscattered diffraction (EBSD). Results show that MEA is susceptible to HE, but is stronger than as-rolled and 3D-printed Cantor alloy and stainless steel. The HE susceptibility of MEA decreases with increasing current density. Ductile fracture with transgranular dimples switches to intergranular brittle fracture with clear slip bands in the interior of grains. EBSD results uncovered that hydrogen facilitates localized slips and deformation twins. Hydrogen-enhanced localized plasticity and hydrogen decohesion are the possible HE mechanisms.

Funder

Shenzhen Science and Technology Institute

Publisher

MDPI AG

Subject

General Physics and Astronomy

Link

https://www.mdpi.com/1099-4300/25/4/673/pdf

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