Cryogenic low-cycle fatigue performance of pre-strained metastable austenitic stainless steel (S30408)

被引：0

作者：

Wang Y.-B. ^{[1
,2
]}

Ding H.-M. ^{[3
,4
]}

Zheng J.-Y. ^{[1
,2
,4
]}

Lu Q.-J. ^{[1
,2
]}

Wang Z.-Y. ^{[1
,2
]}

Xu P. ^{[5
]}

Chen Z.-W. ^{[6
]}

机构：

[1] Institute of Process Equipment, Zhejiang University, Hangzhou

[2] High-pressure Process Equipment and Safety Engineering Research Center of Ministry of Education, Zhejiang University, Hangzhou

[3] School of Mechanical Engineering, Zhejiang University, Hangzhou

[4] State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou

[5] School of Aeronautics and Astronautics, Zhejiang University, Hangzhou

[6] China Special Equipment Inspection and Research Institute, Beijing

来源：

Zhejiang Daxue Xuebao (Gongxue Ban)/Journal of Zhejiang University (Engineering Science) | 2020年 / 54卷 / 11期

关键词：

Cyclic stress response; Liquid-nitrogen temperature; Low-cycle fatigue life; Martensitic transformation; Pre-strain temperature;

D O I：

10.3785/j.issn.1008-973X.2020.11.014

中图分类号：

学科分类号：

摘要：

Cryogenic pressure vessel's low-cycle fatigue performance is greatly affected by cold forming and warm forming. Tensile experiments and low-cycle fatigue experiments of metastable austenitic stainless steel S30408 at liquid-nitrogen temperature (77 K) were conducted to analyze the influences of pre-strain (0 and 0.35) and pre-strain temperature (293 K and 363 K) on the cryogenic low-cycle fatigue performance. Due to 0.35 pre-strain resulting in the increase in dislocation density and formation of strain-induced body centered cubic martensite, 293 K pre-strain specimen shows higher initial cyclic stress amplitude, smaller fatigue striation width and longer low-cycle fatigue life than base metal specimen at 77 K. When the pre-strain temperature changes from 293 K to 363 K, the austenite phase owns higher stability, martensitic transformation is blocked, the initial cyclic stress amplitude decreases, the fatigue striation width increases, and the strengthening effects on the cryogenic low-cycle fatigue life caused by 0.35 pre-strain is weakened. In general, 0.35 pre-strain shows significant strengthening effects on the S30408's cryogenic low-cycle fatigue performance, and the effects are limited by the pre-strain temperature. © 2020, Zhejiang University Press. All right reserved.

引用

页码：2190 / 2195

页数：5

共 27 条

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