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Nanoindentation creep deformation behaviour of high nitrogen nickel-free austenitic stainless steel |
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| Authors: | Xiaoru Zhang Shicheng Sun Shuang Han Jianshe Lian |
| Affiliation: | 1. Key Laboratory of Automobile Materials, Ministry of Education, Jilin University, Changchun, People’s Republic of China;2. School of Materials Science and Engineering, Jilin University, Changchun, People’s Republic of China;3. School of Materials Science and Engineering, Changchun University of Technology, Changchun, People’s Republic of China |
| Abstract: | Nanoindentation tests of the high nitrogen nickel-free austenitic stainless steel (HNS) were performed with peak load in a wide range of 100–600?mN to investigate the nanoindentation creep deformation behaviours. The results of the nanoindentation creep tests have demonstrated that the load plateaus, creep strain rate and creep stress of the cold-rolled HNS are larger and its creep stress exponent is smaller than the solution-treated HNS. The analysis reveals that the obvious creep deformation behaviour in the cold-rolled HNS arises from the rapidly relaxed dislocation structures in the initial transition regime, while the small creep deformation behaviour of the solution-treatedHNS is mainly attributed to that the stable dislocation structures for the intensive interactions between dislocations. |
| Keywords: | High nitrogen nickel-free austenitic stainless steel nanoindentation test nanoindentation creep deformatoin behaviour creep stress exponent solution treatment cold rolling twin dislocations |