Browsing Institutt for konstruksjonsteknikk by Author "qiao, lijie"
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Cleavage cracking of ductile-metal substrates induced by brittle coating fracture
Guo, Tao; Chen, Yanmeng; Cao, Ruohan; Pang, Xiaolu; He, Jianying; qiao, lijie (Journal article; Peer reviewed, 2018)Brittle coatings are often used to protect underlying ductile substrates from damage. Recent experimental observations show that the fracture of a brittle coating can cause the micro-cracking of the ductile metal substrates, ... -
CS-AFM study on Pb-induced degradation of passive film on nickel-based alloy in high temperature and high pressure water
Li, Weipeng; Mi, Zhishan; Qin, Sixiao; Gao, Lei; He, Jianying; Guo, Liqiu; qiao, lijie (Journal article, 2018)The degradation mechanism of trace Pb on nickel-based alloy passive film in pure water at 270 is researched by surface analysis techniques and calculations. Experimental results show that Pb reduces the oxygen content and ... -
Discontinuous cracking of TiN films on a steel substrate induced by an adhesive interlayer
Guo, Tao; Pang, Xiaolu; He, Jianying; qiao, lijie (Journal article; Peer reviewed, 2019)The basic mechanisms governing the process of cracking of single-layer brittle films have been extensively explored through both simulations and experiments. However, the role that an adhesive interlayer plays in the ... -
High temperature brittle film adhesion measured from annealing-induced circular blisters
Guo, Tao; He, Jianying; Pang, Xiaolu; Volinsky, Alex; Su, Yanjing; qiao, lijie (Journal article; Peer reviewed, 2017)Testing high temperature brittle film adhesion is necessary for understanding interfacial failure at elevated temperatures. However, current brittle film adhesion measurement methods are limited to room temperature. ... -
Hydrogen informed Gurson model for hydrogen embrittlement simulation
Yu, Haiyang; Olsen, Jim Stian; Alvaro, Antonio; qiao, lijie; He, Jianying; Zhang, Zhiliang (Journal article; Peer reviewed, 2019)Hydrogen-microvoid interactions were studied via unit cell analyses with different hydrogen concentrations. The absolute failure strain decreases with hydrogen concentration, but the failure loci were found to follow the ... -
Hydrogen-induced cracking and hydrogen embrittlement of Ni2MnGa FSMAs
Shen, Liancheng; su, yanjing; He, Jianying; chu, wuyang; qiao, lijie (Journal article; Peer reviewed, 2010)Hydrogen-induced cracking and hydrogen embrittlement of Ni50Mn30Ga20 ferromagnetic shape memory alloys (FSMAs) were studied through indentation and tension experiments supplemented with in situ observation. The results ... -
Local electrical properties of thermally grown oxide films formed on duplex stainless steel surfaces
Guo, Liqiu; Yang, Binjie; He, Jianying; qiao, lijie (Journal article, 2018)The local electrical properties of thermally grown oxide films formed on ferrite and austenite surfaces of duplex stainless steel at different temperatures were investigated by Current sensing atomic force microscopy, X-ray ... -
Size-dependent Phase Transformation and Fracture of ZnO Nanowires
He, Jianying; Wu, Jianyang; Nagao, Shijo; qiao, lijie; Zhang, Zhiliang (Journal article; Peer reviewed, 2017)The structural and mechanical properties of ZnO nanowires (NWs) have been systematically investigated by using molecular dynamic simulations based on the empirical Buckingham potential. Under tensile loading in <0001> ... -
Stress corrosion cracking of Ni2MnGa magnetic shape memory alloy in water and moist atmosphere
shen, liancheng; He, Jianying; su, yanjing; chu, wuyang; qiao, lijie (Journal article; Peer reviewed, 2009)We prepared two kinds of cracks (surface cracks and transfixion cracks) to in situ study stress corrosion cracking of seven-layered (which is denoted as 7 M or 14 M) off-stoichiometric Ni2MnGa magnetic shape memory alloy ... -
Substrate slip steps promote cracking and buckling of thin brittle film
Guo, Tao; Pang, Xiaolu; He, Jianying; Zhang, Zhiliang; qiao, lijie (Journal article; Peer reviewed, 2019)Cracking and buckling are the two major failure phenomena of brittle film/metal substrate structures. Herein, by depositing titanium nitride brittle films with strong and poor adhesion on stainless steel substrates, we ...