| 退火处理及沉积方向对激光沉积TA15钛合金性能和组织的影响 |
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| 引用本文： | 杨光,王文东,钦兰云,李长富,任宇航,王维. 退火处理及沉积方向对激光沉积TA15钛合金性能和组织的影响[J]. 稀有金属材料与工程, 2016, 45(12): 3295-3301 |
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| 作者姓名： | 杨光 王文东 钦兰云 李长富 任宇航 王维 |
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| 作者单位： | 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,沈阳航空航天大学 航空制造工艺数字化国防重点学科实验室 |
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| 基金项目： | 国家自然科学(51505301,51305280,51375316)；辽宁省自然科学(2015020118) |
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| 摘 要： | 以TA15钛合金粉末为原料,利用激光沉积制造方法制备TA15钛合金拉伸试样厚壁件。通过光学显微镜(OM)、扫描电子显微镜(SEM)和X射线衍射(XRD)等方法研究退火温度及沉积方向对TA15钛合金组织、拉伸性能的影响,以及α相变形机制。结果表明：随着退火温度升高,显微组织中α相长宽比呈上升趋势；激光沉积成形TA15钛合金厚壁件在沉积和垂直沉积方向上的力学性能存在差异,沉积方向上的抗拉强度明显均低于垂直沉积方向上的抗拉强度；柱状晶晶界对α片层的受力变形有一定的阻碍作用；α片层通过挤压变形和滑移变形两种机制发生变形或断裂；两种方向上拉伸断裂方式不同,沿沉积方向上断裂为韧性断裂,沿垂直沉积方向上断裂为半解理半韧性断裂。
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| 关 键 词： | 激光沉积制造 TA15钛合金 退火温度 显微组织 各向异性 |
| 收稿时间： | 2016-02-29 |
| 修稿时间： | 2016-04-18 |
Effect of Annealing Treatment and Deposition Direction on Mechanical Properties and Microstructures of Laser Deposition Manufacturing TA15 titanium alloy |
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| Yang Guang,Wang Wendong,Qin Lanyun,Li Changfu,Ren Yuhang and Wang Wei. Effect of Annealing Treatment and Deposition Direction on Mechanical Properties and Microstructures of Laser Deposition Manufacturing TA15 titanium alloy[J]. Rare Metal Materials and Engineering, 2016, 45(12): 3295-3301 |
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| Authors: | Yang Guang Wang Wendong Qin Lanyun Li Changfu Ren Yuhang Wang Wei |
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| Affiliation: | Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University,Key Laboratory of Fundamental Science for National Defence of Aeronautical Digital Manufacturing Process,Shenyang Aerospace University |
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| Abstract: | The TA15 titanium alloy plates were prepared by laser deposition manufacturing using TA15 titanium alloy powder. The effect of annealing treatment and deposition direction on microstructure, and mechanical properties of laser deposition manufacturing TA15 titanium alloy and alpha phase deformation mechanism has been studied. The experimental results showed that the length-width ratio of alpha phase in microstructure shows risen when increasing the annealing temperature; the mechanical properties are different in deposition direction and vertical deposition direction; the tensile strength in the deposition direction is obviously lower than that in the vertical direction; columnar crystal grain boundary has a baffling effect on alpha lamellar distortion; alpha lamellar deformation or fracture by extrusion and slippage; different directions have different tensile fracture modes, deposition direction is ductile fracture, vertical deposition direction is semi-cleavage and semi-ductile fracture. |
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| Keywords: | Laser deposition manufacturing TA15 titanium alloy Annealing temperature microstructure anisotropy |
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