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: 747次

Effect of Annealing Method on Microstructure and Mechanical Propertiesof TA15 Titanium Alloys by Laser Deposition Manufacturing
作者单位
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, 辽宁 沈阳 110136
2 沈阳飞机工业(集团)有限公司, 辽宁 沈阳 110034
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.

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