Crack initiation and short crack propagation of friction stir welded TC17 alloy joint

被引：11

作者：

Song, Jun ^{[1
,2
]}

Liu, Hanqing ^{[1
,3
]}

Cui, Jie ^{[1
]}

Liu, Yongjie ^{[1
,2
]}

Li, Lang ^{[1
,2
]}

Chen, Yao ^{[1
,2
]}

Wang, Qingyuan ^{[1
,2
,4
]}

Chen, Qiang ^{[3
]}

机构：

[1] Sichuan Univ, Failure Mech & Engn Disaster Prevent & Mitigat Key, Chengdu 610065, Sichuan, Peoples R China

[2] Sichuan Univ, Coll Architecture & Environm, MOE Key Lab Deep Earth Sci & Engn, Chengdu 610065, Peoples R China

[3] Kyushu Univ, Dept Mech Engn, Fukuoka 8190395, Japan

[4] Chengdu Univ, Inst Adv Study, Chengdu 610106, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 168卷

基金：

中国国家自然科学基金;

关键词：

Friction stir welding; Microcrack initiation; Heterogeneity in tensile and fatigue behavior; High angle grain boundary; Dynamic recrystallication; MICROSTRUCTURAL EVOLUTION; MECHANICAL-PROPERTIES; TITANIUM-ALLOYS; ORIENTATION; BEHAVIOR; GROWTH;

D O I：

10.1016/j.ijfatigue.2022.107426

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Heterogeneities of microstructure, tensile and fatigue behavior of FSWed titanium alloy joint were in-situ studied by utilizing replica, DIC and electron back-scattered diffraction methods. Banded TMAZ consisting of needle-like alpha precipitates and elongated alpha p within DRXed beta grains bridges the HAZ and SZ. Fine beta grains in SZ contribute to the highest tensile strength in the 3rd layer. Fatigue cracks prefer to nucleate from HAGBs and {1 1 2} 1 1 1 slip deformation of beta structure in the 2nd layer of SZ below 210 MPa and 3rd layer of HAZ otherwise. Transgranular crack propagation along the {112} planes exhibits a higher crack growth rate in HAZ than SZ.

引用

页数：12

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