TY - JOUR
T1 - Tensile and fatigue behavior of electron beam welded TC17 titanium alloy joint
AU - Liu, Hanqing
AU - Wang, Haomin
AU - Zhang, Zhen
AU - Liu, Yongjie
AU - Huang, Zhiyong
AU - Wang, Qingyuan
AU - Chen, Q.
N1 - Funding Information:
The authors would gratefully acknowledge the financial support by the National Natural Science Foundation of China (No. 11832007 , No. 11772209 and No. 11802042 ) and the Sichuan Science and Technology Program (Grant No. 2017RZ0065 ). Hanqing Liu thanks for the financial support from the China Scholarship Council (CSC, 201806240228 ).
Publisher Copyright:
© 2019
PY - 2019/11
Y1 - 2019/11
N2 - The tensile fracture was originated from the strain concentration in equiaxed grain region adjacent to the fusion center, where a lower micro-hardness occurred when compared to the columnar grain region in the fusion zone. A higher stress level was more potential to fabricate a fatal fatigue crack initiating from the intrinsic metallic deficiencies. At a lower stress of 180 MPa, fatigue crack appeared to initiate from the intergranular welding pores other than the intrinsic metallic deficiencies. Furthermore, intergranular welding pores induced fatal crack initiation became the major fatigue crack initiation mechanisms when the fatigue stress amplitude down to 140 MPa.
AB - The tensile fracture was originated from the strain concentration in equiaxed grain region adjacent to the fusion center, where a lower micro-hardness occurred when compared to the columnar grain region in the fusion zone. A higher stress level was more potential to fabricate a fatal fatigue crack initiating from the intrinsic metallic deficiencies. At a lower stress of 180 MPa, fatigue crack appeared to initiate from the intergranular welding pores other than the intrinsic metallic deficiencies. Furthermore, intergranular welding pores induced fatal crack initiation became the major fatigue crack initiation mechanisms when the fatigue stress amplitude down to 140 MPa.
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U2 - 10.1016/j.ijfatigue.2019.105210
DO - 10.1016/j.ijfatigue.2019.105210
M3 - Article
AN - SCOPUS:85069942534
VL - 128
JO - International Journal of Fatigue
JF - International Journal of Fatigue
SN - 0142-1123
M1 - 105210
ER -