中国激光, 2020, 47 (12): 1202006, 网络出版: 2020-11-27
激光直接沉积TA2/TA15梯度材料弯曲性能的有限元模拟 
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Finite Element Simulation on Bending Properties of TA2/TA15 Gradient Material by Laser Direct Deposition
图 & 表
图 1. 激光直接沉积过程示意图以及三点弯曲试验取样示意图。(a)多道多层沉积示意图;(b)三点弯曲试验取样位置示意图
Fig. 1. Schematic of laser direct deposition process and sampling diagram for three-point bending experiment. (a) Schematic of multi-channel and multi-layer deposition; (b) sampling diagram for three-point bending experiment
图 2. 有限元模拟三点弯曲试验的几何模型及网格划分
Fig. 2. Geometric model and meshing of three-point bending experiment in finite element simulation
图 3. TA2/TA15梯度材料中TA15和TA2合金区域的OM和SEM图。(a) TA15;(b) TA2
Fig. 3. OM and SEM images of TA15 and TA2 zones of TA2/TA15 gradient materials. (a) TA15; (b) TA2
图 4. TA2/TA15梯度材料过渡区的OM和SEM图。(a)过渡区的宏观组织;(b)(c)(d)不同过渡区的微观组织
Fig. 4. OM and SEM images of transition zone of TA2/TA15 gradient material. (a) Macrostructure image of transition zone; (b)(c)(d) microstructures of different transition zones
图 5. 铝含量不同的TA2/TA15梯度材料的显微硬度
Fig. 5. Microhardness of TA2/TA15 gradient materials with different Al contents
图 6. 三点弯曲试验结果。(a)试样的宏观变形图;(b)试样的载荷-位移曲线;(c)试样的抗弯强度;(d)试样弯曲失效的位移
Fig. 6. Experimental result of three-point bending. (a) Macroscopic deformation of samples; (b) load-displacement curves of samples; (c) bending strength of specimens; (d) displacement of samples in bending failure
图 7. 试样弯曲失效的SEM图。(a)(b) TA15试样;(c) GZ-1试样;(d) GZ-2试样
Fig. 7. SEM images of samples after failure during bending experiment. (a)(b) TA15 sample; (c) GZ-1 sample; (d) GZ-2 sample
图 8. GZ-3试样中裂纹的扩展路径图。(a)裂纹扩展路径的底部位置;(b)裂纹扩展路径的开始位置
Fig. 8. Images of crack propagation path of GZ-3 sample. (a) Bottom of crack propagation path; (b) beginning position of crack propagation path
图 9. x方向上最大真实应变为0.005、0.05、0.1时有限元模拟梯度材料的应力场分布图。(a) TA15模型;(b) GZ-1模型;(c) GZ-2模型;(d) GZ-3模型
Fig. 9. Stress field distribution diagrams of gradient materials obtained by finite element simulation when the maximum true strain in x direction is 0.005, 0.05, and 0.1. (a) TA15 model; (b) GZ-1 model; (c) GZ-2 model; (d) GZ-3 model
图 10. 外加载荷分别为200,400,600 N时有限元模拟梯度材料的应力场分布图。(a) TA15模型;(b) GZ-1模型;(c) GZ-2模型;(d) GZ-3模型
Fig. 10. Stress field distribution of gradient materials obtained by finite element simulation when the load is 200 N, 400 N, and 600 N. (a) TA15 model; (b) GZ-1 model; (c) GZ-2 model; (d) GZ-3 model
表 1TA2和TA15合金的化学成分
Table1. Chemical composition of TA2 and TA15 alloys
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表 2沉积态TA2、TA15及TA2/TA15梯度材料的拉伸性能
Table2. Tensile properties of as-deposited TA2, TA15 and TA2/TA15 gradient materials
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胡悦, 刘莎莎, 程序, 刘栋. 激光直接沉积TA2/TA15梯度材料弯曲性能的有限元模拟[J]. 中国激光, 2020, 47(12): 1202006. Hu Yue, Liu Shasha, Cheng Xu, Liu Dong. Finite Element Simulation on Bending Properties of TA2/TA15 Gradient Material by Laser Direct Deposition[J]. Chinese Journal of Lasers, 2020, 47(12): 1202006.
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