Elastoplastic analysis of process induced residual stresses in thermally sprayed coatings
Elastoplastic analysis of process induced residual stresses in thermally sprayed coatings
复制标题
热喷涂涂层中工艺引起的残余应力的弹塑性分析
DOI：
10.1063/1.3374710
复制
发表时间：
2010-07
影响因子：
3.2
通讯作者：
Xu Binshi
中科院分区：
文献类型：
--
作者：
Chen Yongxiong;Liang Xiubing;Liu Yan;Xu Binshi
热喷涂过程中产生的残余应力在以前的研究中已经得到了广泛的研究。然而，这些工作大多集中在弹性变形范围内。本文建立了一个预测热喷涂涂层残余应力的弹塑性模型，该模型考虑了沉积诱导应力和冷却过程中基体与涂层之间的热收缩差引起的残余应力。沉积引起的应力是基于这样的假设进行分析的：涂层是逐层形成的，然后在添加每层之后在多层结构内容纳失配应变（因此引起塑性变形）。从知识的试样尺寸，加工温度，和材料性能，结构内的残余应力分布可以通过实施一个简单的计算机程序的模型来确定。最后，对Inconel 718合金表面等离子喷涂NiCoCrAlY合金进行了实例研究。除了从本研究中观察到的一些类似的现象相比，以前的弹性模型在文献中报道的，弹塑性模型还提供了一些有趣的功能预测的残余应力。
The residual stresses induced from thermal spraying process have been extensively investigated in previous studies. However, most of such works were focused on the elastic deformation range. In this paper, an elastoplastic model for predicting the residual stresses in thermally sprayed coatings was developed, in which two main contributions were considered, namely the deposition induced stress and that due to differential thermal contraction between the substrate and coating during cooling. The deposition induced stress was analyzed based on the assumption that the coating is formed layer-by-layer, and then a misfit strain is accommodated within the multilayer structure after the addition of each layer (plastic deformation is induced consequently). From a knowledge of specimen dimensions, processing temperatures, and material properties, residual stress distributions within the structure can be determined by implementing the model with a simple computer program. A case study for the plasma sprayed NiCoCrAlY on Inconel 718 system was performed finally. Besides some similar phenomena observed from the present study as compared with previous elastic model reported in literature, the elastoplastic model also provides some interesting features for prediction of the residual stresses.
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影响因子：
2.1
作者：
Hsueh, CH
通讯作者：
Hsueh, CH
DOI：
10.1016/s0921-5093(00)00862-5
发表时间：
2000-09
影响因子：
6.4
作者：
M. Buchmann;R. Gadow;J. Tabellion
通讯作者：
M. Buchmann;R. Gadow;J. Tabellion
影响因子：
5.4
作者：
Z. Gan;H. Ng;A. Devasenapathi
通讯作者：
Z. Gan;H. Ng;A. Devasenapathi
影响因子：
3.2
作者：
Nikishkov, GP
通讯作者：
Nikishkov, GP
影响因子：
3.2
作者：
Xian‐Cheng Zhang;Bin-shi Xu;F. Xuan
通讯作者：
Xian‐Cheng Zhang;Bin-shi Xu;F. Xuan