| Summary: | 碩士 === 國立中山大學 === 材料科學研究所 === 92 === Wang etc. find that when abnormal grain growth has volume fraction of 25% of coarser grain (bimodal structure), the material can exhibit high strength and high tensile ductility. We will find that if Ni has the same properties.
The conclusion show that after 95% reduction at liguid nitrogen temperature and under different annealing temperature, when strength growth, then tensile ductility down. And we also measure hardness, stress-strain curve,and morphology after 95% reduction in Ni.And LBs spacing is closer, LBs misorientation is not variation a lot when rolling at low temperature then in room temperature.
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