Superplastic Deformation Microstructure and Property of Laser Welded Ti-4.5Al-3V-2Fe-2Mo Alloy

被引：0

作者：

Fu Mingjie ^{[1
,2
,3
]}

Chen Li ^{[1
,4
]}

Zeng Yuansong ^{[1
,2
,3
]}

机构：

[1] Beijing Aeronaut Mfg Technol Res Inst, Beijing 100024, Peoples R China

[2] Aeronaut Key Lab Plast Forming Technol, Beijing 100024, Peoples R China

[3] Beijing Key Lab Digital Plast Forming Technol & E, Beijing 100024, Peoples R China

[4] Key Lab High Energy Dens Beam Proc Technol, Beijing 100024, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2018年 / 47卷 / 08期

关键词：

SP700 titanium alloy; laser welding; superplasticity; microstructure; tensile strength; FRACTURE;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The superplastic forming ability, microstructure evolution and tensile property of fiber laser welding SP700 titanium alloy after superplastic forming (SPF) were investigated. Results indicate that when deformed at 800 degrees C, the cone part has better superplasticity with the welding direction parallel to the rolling direction of base material. Its max. pressure is 0.8 MPa and the cone height is 75 mm, which is 20 mm higher than that of base material. With the increase of defofmation, the coarse columnar grains and weld undercut are eliminated gradually and the grains are comparably fine. With about 33% deformation reduction, the tensile strength of materials with two welding directions all decreases, and tensile strength of the specimen formed at 775 degrees C with welding direction parallel to the rolling direction only decreases by 2.2%. The fracture positions are all on the base material for the cone part and tensile specimen.

引用

页码：2555 / 2560

页数：6

共 12 条

[1] Titanium alloys and processing for high speed aircraft
Brewer, WD
Bird, RK
Wallace, TA
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 243 (1-2): : 299 - 304
[2] Cai Jian-ming, 2006, Journal of Aeronautical Materials, V26, P71
[3] Microstructure and notched tensile fracture of Ti-6Al-4V to Ti-4.5Al-3V-2Fe-2Mo dissimilar welds
Chu, C. Y.
Hsieh, C. T.
Tsay, L. W.
[J]. MATERIALS & DESIGN, 2014, 63 : 14 - 19
[4] Improvement in fracture toughness of Ti-4.5Al-3V-2Mo-2Fe through microstructural optimization
Gunawarman
Niinomi, M
Eylon, D
Fujishiro, S
Ouchi, C
Kazino, T
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2003, 34 (02): : 267 - 275
[5] Gunawarman, 2001, MAT SCI ENG A-STRUCT, V308, P216, DOI 10.1016/S0921-5093(00)01986-9
[6] Guo Heping, 2008, WELDING JOINING, P41
[7] Huang Jinchang, 1998, Rare Metals and Cemented Carbides, P58
[8] Langdon Terence G., 2016, Materials Science Forum, V838-839, P3, DOI 10.4028/www.scientific.net/MSF.838-839.3
[9] Fatigue Crack Growth Behavior of Ti-4.5Al-3V-2Fe-2Mo Laser Welds
Tsay, L. W.
Ding, Y. S.
Chung, W. C.
Chen, C.
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2010, 41A (06): : 1502 - 1510
[10] The Effect of Preheating on Notch Fracture of Ti-4.5Al-3V-2Fe-2Mo Laser Welds
Tsay, Leu-Wen
Jiang, Yun-Chen
Chen, Chun
[J]. MATERIALS TRANSACTIONS, 2009, 50 (10) : 2396 - 2402

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