“…Therefore, to investigate failure issues of thin coating layers/substrates, experimental study is the best and directly approach (Wang and Xu, 2003;2004;2009;Li et al, 2008a;2008b;Dean et al, 2015). In addition, it is necessary to estimate the delivery criterion of stress close to the interface of thin anodized coatings and thick substrates using SEM in-situ technology Wang and Fan, 2006;Jia et al, 2012;Ren et al, 2013;Ren and Wang, 2014).…”