载荷方向对TC4钛合金激光焊缝疲劳性能的影响

许良; 马闯; 周松; 王磊; 回丽; 黄双君

载荷方向对TC4钛合金激光焊缝疲劳性能的影响

许良¹,
马闯¹,
周松¹,
王磊¹,
回丽^2,,
黄双君²

1.
沈阳航空航天大学航空制造工艺数字化国防重点学科实验室, 沈阳 110136
2.
沈阳航空航天大学机电工程学院, 沈阳 110136

基金项目: 国家自然科学基金资助项目（51405309）；辽宁省自然科学基金资助项目（2013024011）

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- 收稿日期: 2015-05-16

Influence of loading direction on fatigue performance of TC4 titanium alloy laser weld

1.
Key Laboratory of Fundamental Science for National Defence of Aerouautical Digital Manufacturing Process, Shenyang Aerospace University, Shenyang, 110136, China
2.
School of Mechatronics Engineering, Shenyang Aerospace University, Shenyang, 110136, China

摘要

摘要: 针对不同载荷方向对TC4钛合金激光焊缝的疲劳性能的影响展开对比试验分析，对激光直、斜焊缝的疲劳寿命和疲劳断口进行了对比计算与分析.结果表明，直焊缝试件的疲劳寿命相比斜焊缝的分散性小，斜焊缝试件的中值疲劳寿命是直焊缝的1.98倍；直、斜焊缝试件疲劳裂纹均起始于显微硬度最低的热影响区表面，直焊试件裂纹在焊缝区扩展至断裂，疲劳裂纹扩展区有脆性解理特征，而斜焊试件裂纹穿过焊缝进入母材扩展至断裂，扩展区有典型韧性扩展特征；在瞬断区，斜焊缝试件比直焊缝表现出更好的韧性.
- TC4钛合金 /
- 载荷方向 /
- 激光焊接 /
- 疲劳寿命
Abstract: Comparative experiments have been carried out to analyze the effects of different loading direction on the fatigue performance of TC4 titanium alloy laser weld. The fatigue life and fracture for this two different welding types were compared. The results showed that the straight weld joint's decentrality is smaller than oblique weld. The fatigue life of oblique weld was 1.98 times of the straight weld. The fatigue crack sources of all the welds initiated at the specimens surface in HAZ of straight and oblique welds, where the hardness was the lowest. The crack grew and failed inside the weld showing brittle cleavage for straight weld, while it passed through the weld and fractured at base material for oblique weld, which showed toughness characteristic. The oblique weld had a better toughness feature compared with the straight weld in the final fracture zone.
- TC4-titanium alloy /
- loading direction /
- laser weld /
- fatigue life

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参考文献(6)

[1]	Caiazzo F, Curcio F, Daurelio G, et al. Ti-6Al-4V sheets lap and butt joints carried out by CO₂ laser: mechanical and morphological characterization[J]. Journal of Materials Processing Technology, 2004, 149(1): 546-552.
[2]	Cheng C, Chan L C, Chow C L. Weldment properties evaluation and form ability study of tailor welded blanks of different thickness combinations and welding orientations[J]. Journal of Materials Science, 2007, 42(15): 5982-5990.
[3]	Pasang T, Amaya J M S, Tao Y, et al. Comparison of Ti-5Al-5V-5Mo-3Cr welds performed by laser beam, electron beam and gas tungsten arc welding[J]. Procedia Engineering, 2013, 63(1): 397-404.
[4]	姚伟, 巩水利, 陈俐, 等. 钛合金激光焊接接头的组织和力学性能[J]. 焊接学报, 2006, 27(2): 69-72. Yao Wei, Gong Shuili, Chen Li, et al. Microstructure and mechanical properties of laser welded joint of titanium alloy[J]. Transactions of the China Welding Institution, 2006, 27 (2): 69-72.
[5]	杨武林, 杨晓华, 李晓延, 等. TC4钛合金薄板激光焊接接头的疲劳寿命及断口分析[J]. 焊接学报, 2013, 34(3): 105-108. Yang Wulin, Yang Xiaohua, Li Xiaoyan, et al. Analysis on fatigue property and fracture mechanism of TC4 titanium alloy joint during laser welding[J]. Transactions of the China Welding Institution, 2013, 34 (3): 105-108.
[6]	陈水生, 林建平, 辛立久, 等. 拼焊板焊缝方向对其单向拉伸性能的影响研究[J]. 材料科学与工艺, 2010, 18(4): 480-485. Chen Shuisheng, Lin Jianping, Xin Linjiu, et al. Effect of welding orientation on tensile properties of tailor welded blanks[J]. Materials Science and Technology, 2010, 18(4): 480-485.

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载荷方向对TC4钛合金激光焊缝疲劳性能的影响

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出版历程

Influence of loading direction on fatigue performance of TC4 titanium alloy laser weld

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出版历程

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