摘要
为了提高Ti6Al4V钛合金的耐磨性能,研究了在其表面采用激光沉积制造原位自生TiC为强化相的钛基功能梯度材料(Ti-FGM)的设计。首先对FGM组分的弹性模量、泊松比、热膨胀系数、密度以及热导率等物性参数进行估算。然后利用有限元分析的方法,对梯度材料进行了热应力优化设计,确定了FGM的最佳形状分布因子P=0.5、层数为6和单层厚度为1 mm。并根据最优参数计算出各层的组分,为下一步进行激光沉积制备工艺提供了依据。
To improve wear resistance of Ti6A14V titanium alloy,optimum design of Ti- Functionally Graded Materials （FGM） is conducted using finite element analysis （FEA）. And the Ti-FGM with in-situ TiC-reinforced phase will be fabricated by means of Laser Metal Deposition （LMD）.Firstly, the physical property parameters such as elastic modules , poisson＇s ratio, thermal expansion, density and thermal conductivity are estimated.Then the optimum component distribution are obtained through the thermal stress simulation calculation.Results show that thermal stresses mitigated by FGM was remarkable when the component distribution exponent P, layers number and layers thickness are 0.5,6 layers and lmm.Based on these parameters,each layer component are calculated which provides a basis for LMD fabrication.
出处
《应用激光》
CSCD
北大核心
2013年第1期30-33,共4页
Applied Laser
基金
中航工业产学研专项资助项目(项目编号:CXY2011SH16)
辽宁省自然科学基金资助项目(项目编号:201202173)
关键词
功能梯度材料
激光沉积成形
钛合金
有限元
functionally graded materials
laser metal deposition
titanium alloy
finite element
