TY - JOUR
T1 - Crack initiation and short crack propagation of friction stir welded TC17 alloy joint
AU - Song, Jun
AU - Liu, Hanqing
AU - Cui, Jie
AU - Liu, Yongjie
AU - Li, Lang
AU - Chen, Yao
AU - Wang, Qingyuan
AU - Chen, Qiang
N1 - Funding Information:
This research work was supported by the National Natural Science Foundation of China (No. 12172238, No. 11832007, No. 12102280, and No. 12022208), and Applied Basic Research Programs of Sichuan Province (No. 2022NSFSC1977). The first author is supported by the China Scholarship Council (CSC), which is sincerely appreciated.
Publisher Copyright:
© 2022
PY - 2023/3
Y1 - 2023/3
N2 - 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 α precipitates and elongated αp within DRXed β grains bridges the HAZ and SZ. Fine β 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 β structure in the 2nd layer of SZ below 210 MPa and 3rd layer of HAZ otherwise. Transgranular crack propagation along the {1 1 2} planes exhibits a higher crack growth rate in HAZ than SZ.
AB - 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 α precipitates and elongated αp within DRXed β grains bridges the HAZ and SZ. Fine β 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 β structure in the 2nd layer of SZ below 210 MPa and 3rd layer of HAZ otherwise. Transgranular crack propagation along the {1 1 2} planes exhibits a higher crack growth rate in HAZ than SZ.
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U2 - 10.1016/j.ijfatigue.2022.107426
DO - 10.1016/j.ijfatigue.2022.107426
M3 - Article
AN - SCOPUS:85143798943
VL - 168
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
M1 - 107426
ER -