Superplastic Properties of Al_2O_3/Ni-Mn Nanocomposite Fabricated by Electrodeposition

作     者：Guofeng Wang Kaifeng Zhang 

作者机构：National Key Laboratory of Precision Hot Processing of Metals Harbin Institute of Technology Harbin 150001 China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2010年第26卷第7期

页      面：625-628页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Natural Scientific Research Innovation Foundation in Harbin Institute of Tech-nology(HIT.NSRIF.2008.37) the National Natural Science Foundation of China(No.50605016) 

主　　题：Electrodeposition Nanocomposites Low temperature superplasticity Microstructure 

摘      要：Ni-Mn nanocomposite reinforced by Al2O3 particles was fabricated by pulse electrodeposition. The average grain size is 60 nm and the content of Mn and Al2O3 particles is 0.3 and 0.6 wt pct, respectively. The superplastic deformation behavior was further studied at the temperatures ranging from 673 to 873 K. A maximum elongation of 530% is obtained in the tension test at a temperature of 773 K and at a strain rate of 1.67×10^-3 s^-1. The curves of the flow stress vs strain rate have features similar to the trend of conventional superplastic materials. The test temperature （773 K） equals to 0.35Tin, which means the material obtains low temperature superplasticity. The microstructures of the composite were examined and grain growth was observed during deformation.