Evaluation of the interfacial shear strength and residual stress of TiAlN coating on ZIRLO™ fuel cladding using a modified shear-lag model approach
Evaluation of the interfacial shear strength and residual stress of TiAlN coating on ZIRLO™ fuel cladding using a modified shear-lag model approach
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DOI：
10.1016/j.jnucmat.2015.06.003
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发表时间：
2015-11-01
影响因子：
3.1
通讯作者：
Preuss, M.
中科院分区：
文献类型：
--
作者：
Liu, Y.;Bhamji, I.;Preuss, M.
本文研究了用于提高水冷堆燃料包壳耐腐蚀性的ZIRLO(TM)合金(ZIRLO(TM))表面TiAlN涂层在正常和异常情况下的残余应力和界面剪切强度。用修正的剪滞模型估算了界面剪切强度的分布和最大值。通过实验确定了对此分析至关重要的参数。从这些输入参数推算出TiAlN涂层与ZIRLO(TM)基片之间的界面剪切强度约为120 Mpa。值得注意的是，涂层的表观强度很高(类似于3.4 Gpa)。然而，这主要是由于较大的压缩残余应力(压缩时为3 Gpa)，必须克服这一点，涂层才会在拉伸时失效，超过这一值的载荷仅为150兆帕。(C)2015年提交人。爱思唯尔出版公司(Elsevier B.V.)
This paper investigates the residual stresses and interfacial shear strength of a TiAlN coating on Zr-Nb-Sn-Fe alloy (ZIRLO (TM)) substrate designed to improve corrosion resistance of fuel cladding used in water-cooled nuclear reactors, both during normal and exceptional conditions, e.g. a loss of coolant event (LOCA). The distribution and maximum value of the interfacial shear strength has been estimated using a modified shear-lag model. The parameters critical to this analysis were determined experimentally. From these input parameters the interfacial shear strength between the TiAlN coating and ZIRLO (TM) substrate was inferred to be around 120 MPa. It is worth noting that the apparent strength of the coating is high (similar to 3.4 GPa). However, this is predominantly due to the large compressive residuals stress (3 GPa in compression), which must be overcome for the coating to fail in tension, which happens at a load just 150 MPa in excess of this. (C) 2015 The Authors. Published by Elsevier B.V.