中国激光, 2020, 47 (10): 1002008, 网络出版: 2020-10-09
激光增材制造Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V钛合金组织与疲劳性能研究 下载: 1126次
Microstructures and Fatigue Properties of Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V Titanium Alloy Fabricated Using Laser Deposition Manufacturing
图 & 表
图 2. 激光增材制造试样及疲劳试样。(a)沉积态试样的尺寸及疲劳样品取样位置;(b)疲劳试样的形状与尺寸
Fig. 2. Laser depositon manufactured sample and fatigue samples. (a) Size of deposited sample and sampling direction of fatigue samples; (b) shape and size of fatigue samples
图 3. 沉积态钛合金的组织。(a) Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V钛合金的宏观组织;(b)(c) Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V钛合金的微观组织;(d) Ti-6Al-4V钛合金的微观组织
Fig. 3. Deposited microstructures of titanium alloy. (a) Macrostructure of Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V; (b)(c) microstructures of Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V; (d) microstructure of Ti-6Al-4V
图 4. 固溶时效处理后钛合金的显微组织。(a)柱状晶组织;(b)初生α相与次生α相;(c)晶界处的α集束
Fig. 4. Microstructures of titanium alloy after solution and aging. (a) Columnar structure; (b) primary α-phase and secondary α-phase; (c) colony of α lath at columnar crystal boundary
图 5. 激光增材制造钛合金的应力-寿命曲线(R=0.06)
Fig. 5. Maximum stress as a function of number of cycles to failure (S-N curve) of laser deposition manufactured titanium alloys (R=0.06)
图 7. 疲劳源区的微观形貌。(a)条状裂纹源;(b)气孔裂纹源;(c)内部气孔
Fig. 7. Microcosmic morphology of fatigue source zone. (a) Strip crack source; (b) pore crack source; (c) deep-seated pore
图 8. 不同应力水平下不同位置处的疲劳源形貌。 (a)试样A,表面气孔;(b)试样B,表面气孔;(c)试样C,内部气孔
Fig. 8. Fatigue source under different stress levels and locations. (a) Sample A, surface pore; (b) sample B, surface pore; (c) sample C, deep-seated pore
图 10. 疲劳主裂纹扩展过程中出现的二次裂纹。(a)二次裂纹平行于主裂纹;(b)二次裂纹垂直于主裂纹
Fig. 10. Secondary cracks appearing in main fatigue cracks growth. (a) Secondary crack parallel to main cracks; (b) secondary crack perpendicular to main cracks
表 1钛合金粉末的化学成分
Table1. Chemical composition of titanium alloys powders
|
钦兰云, 吴佳宝, 王伟, 王超, 李长富, 杨光. 激光增材制造Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V钛合金组织与疲劳性能研究[J]. 中国激光, 2020, 47(10): 1002008. Qin Lanyun, Wu Jiabao, Wang Wei, Wang Chao, Li Changfu, Yang Guang. Microstructures and Fatigue Properties of Ti-6Al-2Mo-2Sn-2Zr-2Cr-2V Titanium Alloy Fabricated Using Laser Deposition Manufacturing[J]. Chinese Journal of Lasers, 2020, 47(10): 1002008.