中国激光, 2018, 45 (3): 0302004, 网络出版: 2018-03-20
退火方式对激光沉积TA15钛合金组织及力学性能的影响 下载: 753次
Effect of Annealing Method on Microstructure and Mechanical Propertiesof TA15 Titanium Alloys by Laser Deposition Manufacturing
激光技术 力学性能 退火方式 显微组织 激光沉积制造 TA15钛合金 laser technique mechanical properties annealing method microstructure laser deposition manufacturing TA15 titanium alloy
摘要
以TA15球形粉末为原料,利用激光沉积制造方法制备了TA15钛合金厚壁件,研究了单重退火和双重退火对TA15钛合金显微组织和室温拉伸性能及各向异性的影响。结果表明,两种退火方式下α相的组织形貌存在明显差异,室温拉伸性能受到β柱状晶晶界影响,呈现出高强度低塑性的特征,沉积方向上的组织变形较大;双重退火对强度及塑性的各向异性具有改善作用;随退火温度的升高,单重退火下的显微硬度变化不明显,而双重退火下的显微硬度略微增大。
Abstract
By using TA15 spherical powder as the raw material, the bulk specimens of TA15 titanium alloy are formed by laser deposition manufacturing. The effects of single-annealing and duplex-annealing on microstructures, tensile properties at room temperature, and anisotropy of TA15 titanium alloys are studied. The results show that, there exist significant differences in the α-phase morphologies under the two annealing methods, tensile properties at room temperature are characterized by high strength and low plasticity due to the influence of β columnar grain boundary, and the deformation in the deposition direction is relatively large. The duplex-annealing can make obvious improvements on the strength and plastic anisotropy. The micro hardness under single-annealing is hardly influenced by the increase of annealing temperature, in contrast, that under duplex-annealing increases slightly.
钦兰云, 徐丽丽, 杨光, 王文东, 倪家强, 尚纯. 退火方式对激光沉积TA15钛合金组织及力学性能的影响[J]. 中国激光, 2018, 45(3): 0302004. Qin Lanyun, Xu Lili, Yang Guang, Wang Wendong, Ni Jiaqiang, Shang Chun. Effect of Annealing Method on Microstructure and Mechanical Propertiesof TA15 Titanium Alloys by Laser Deposition Manufacturing[J]. Chinese Journal of Lasers, 2018, 45(3): 0302004.