Recrystallization Mechanisms Leading to the Formation of Nanoscale Grains in a Ni-20%Cr Alloy Subjected to Intense Plastic Deformation

摘要：

Microstructure evolution during annealing of a Ni-20%Cr alloy subjected to high-pressure torsion (HPT) at ambient temperature was examined. It was shown that recrystallization processes are dependent on the annealing temperature and strain. Discontinuous static recrystallization (DSRX) took place in the alloy strained to e<3. Continuous grain growth (GG) occured under subsequent annealing in the material strained to e>6. It was attributed to the fact that HPT led to the formation of nanoscale grains with an average size of ~50 nm. Increasing fraction of these grains with strain led to transition from DSRX to continuous GG under subsequent annealing. The different annealing behavior was attributed to strong strain dependence for the relationship between driving pressures, which were caused by the stored dislocations and the boundary energy.

作者: Nadezhda Dudova Andrey Belyakov Rustam Kaibyshev

作者单位: Belgorod State University,Pobeda 85,Belgorod 308015,Russia

会议类型: 国际会议

会议名称: 5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)

会议地点: 南京

会议语种:英文

页码: 349-354

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）