Deposition-induced residual stresses in plasma-sprayed coatings
Deposition-induced residual stresses in plasma-sprayed coatings
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DOI：
10.1016/j.surfcoat.2004.02.010
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发表时间：
2004-10
影响因子：
5.4
通讯作者：
Z. Gan;H. Ng;A. Devasenapathi
中科院分区：
文献类型：
--
作者：
Z. Gan;H. Ng;A. Devasenapathi
采用耦合传热和弹塑性有限元分析方法研究了镍钴合金（NiCoCrAlY）在铝盘（AA1100）基体上沉积过程中热应力的产生和发展。采用通用商用有限元软件ANSYS对沉积过程中的温度、应力和应变历史进行了模拟。采用了有限元法的一种特殊软件功能，称为元素的生与死。采用偏转测量的方法，对喷涂过程中产生的应力进行了实验研究。数值预测的试件挠曲形状与试验结果吻合较好，表明数值弹塑性模型的应力-应变分布具有较好的精度。
Coupled heat transfer and elastic–plastic finite element analyses were conducted to study thermal stress generation and development during deposition of a nickel–cobalt (NiCoCrAlY) alloy on an aluminum disc (AA1100) substrate. A general purpose commercial finite element method (FEM) software ANSYS was used for the simulation of the temperature as well as stress and strain histories during the deposition process. A FEM special software feature called the element birth and death was used. The stress built-up during spraying was experimentally obtained by means of deflection measurement. A close agreement between the numerically predicted deflected shapes of the specimen and the experimental results indicated that the stress–strain distributions from the numerical elastic–plastic model could be applied with reasonable accuracy.