Damage evaluation of the austenitic heat-resistance steel subjected to creep by using Kikuchi pattern parameters-Reference-Cited by-同舟云学术

Damage evaluation of the austenitic heat-resistance steel subjected to creep by using Kikuchi pattern parameters

Published:2024-01-01 Issue:1 Volume:43 Page:
ISSN:2191-0324
Container-title:High Temperature Materials and Processes
language:en
Short-container-title:

Author:

Du Zechen¹²,Risu Na¹,Zhang Yuetao¹,Chen Jianguo³,Wang Xiao¹⁴

Affiliation:

1. China Energy Boiler and Pressure Vessel Inspecton CO., LTD. , Beijing , 100070 , China

2. LMFS, Institute of Mechanics, Chinese Academy of Sciences , Beijing , 100190 , China

3. Institute of Public Safety Research, Tsinghua University , Beijing , 100084 , China

4. School of Mechanical Engineering, Nantong University , Nantong 226019 , China

Abstract

Abstract Austenitic heat-resistance steel is widely employed in ultra-supercritical power generation because of its superior performance. This article reports the evaluation of creep damage of a typical Super304H austenitic heat-resistance steel by using the Kikuchi pattern parameters, such as band contrast (BC), mean angular deviation (MAD), and band slope (BS). It was found that the mean BC and MAD values did not show a monotonic changing trend and then an in-depth research that distinguished grain boundary and grain interior regions of Super304H steel was studied, respectively. The results manifested that, with the increase of creep time, both the mean BC and BS values showed a monotonic decreasing trend, while the MAD did not. Besides, compared with the BC, the change amplitude of BS was larger. The results indicate that the BS could be a useful indicator, which can be utilized to evaluate the creep degree of Super304H steel in a quantitative way.

Publisher

Walter de Gruyter GmbH

Link

https://www.degruyter.com/document/doi/10.1515/htmp-2024-0004/pdf

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