Fatigue behaviors and life evaluation of AISI304 stainless steel under non-proportional multiaxial random loading

被引：4

作者：

Wang, Yu-Chen ^{[1
]}

Xu, Le ^{[2
]}

He, Lei ^{[3
,5
]}

Cheng, Lv-Yi ^{[4
]}

Chang, Shuai ^{[4
]}

Yoshikawa, Shoto ^{[1
]}

Tu, Shan-Tung ^{[4
]}

Itoh, Takamoto ^{[3
,5
]}

机构：

[1] Ritsumeikan Univ, Grad Sch Sci & Engn, 1-1-1 Nojihigashi, Kusatsu, Shiga 5258577, Japan

[2] Tohoku Univ, Grad Sch Engn, Fracture & Reliabil Res Inst, Sendai, Miyagi 9808579, Japan

[3] Ritsumeikan Univ, Coll Sci & Engn, 1-1-1 Nojihigashi, Kusatsu, Shiga 5258577, Japan

[4] East China Univ Sci & Technol, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

[5] Ritsumeikan Univ, 1-1-1 Nojihigashi, Kusatsu, Shiga 5258577, Japan

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2024年 / 186卷

关键词：

Multiaxial fatigue; Random loading; Non-proportional loading; Life evaluation; Microstructure observation; MARTENSITIC-TRANSFORMATION; PLASTIC-DEFORMATION; PREDICTION; PHASE; MODEL; HYSTERESIS; PARAMETER; DAMAGE;

D O I：

10.1016/j.ijfatigue.2024.108417

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Fatigue tests on AISI304 stainless steel under non-proportional multiaxial random loading conditions were conducted with uniform hollow specimens at room temperature. The results revealed initial hardening and subsequent cyclic softening under uniaxial loadings and additional hardening under non-proportional multiaxial loadings. This shift from softening to additional hardening significantly reduced the failure life. Fractographic analysis and Electron Backscatter Diffraction (EBSD) observations identified planar slip as the dominant deformation mechanism under uniaxial loading. Multiple slip system activations, strong slip interactions, and martensitic transformation were key factors influencing changes in cyclic deformation behavior under nonproportional loadings. A novel life evaluation method based on the Itoh - Sakane (IS) method was established, demonstrating accurate evaluations for both uniaxial and non-proportional multiaxial fatigue life under random loading conditions.

引用

页数：14

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