Effect of elastic anisotropy on strain relief and residual stress determination in cubic systems by FIB-DIC experiments
Effect of elastic anisotropy on strain relief and residual stress determination in cubic systems by FIB-DIC experiments
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DOI：
10.1016/j.matdes.2016.09.046
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发表时间：
2016-12
影响因子：
8.4
通讯作者：
Markus Krottenthaler;L. Benker;M. Z. Mughal;M. Sebastiani;K. Durst;M. Göken
中科院分区：
文献类型：
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作者：
Markus Krottenthaler;L. Benker;M. Z. Mughal;M. Sebastiani;K. Durst;M. Göken
聚焦离子束研磨和数字图像相关分析(FIB-DIC)方法已被证明是一种有效测量涂层和块体材料中残余应力的方法。本文研究了立方对称单晶的弹性各向异性对FIB-DIC测量残余应力解释的影响。建立了与晶体取向相关的、弹性各向异性的双槽铣削几何三维有限元模型，并用原位四点弯曲纳米镍和单晶CMSX-6合金的FIB-DIC测量结果进行了验证。讨论了简化假设与完全各向异性模型的局限性。
Focused Ion Beam milling and Digital Image Correlation analysis (FIB-DIC) method has been shown to offer an effective measure of residual stresses in coatings and bulk materials. In the present work the effect of elastic anisotropy on the residual stress interpretation from FIB-DIC measurements is studied for single crystals with cubic symmetry. Crystal orientation-dependent, elastically anisotropic 3D finite element models of the double slot milling geometry were developed and verified against FIB-DIC measurements performed on in situ four point bent samples of nanocrystalline nickel and single crystal CMSX-6 alloy. A discussion is presented of the limitations of the simplified assumptions vs full anisotropic modelling.