利用金相分析、力学性能测试、显微硬度分析、Image Pro Plus马氏体覆盖分析和J-Matpro性能模拟预测分析对冷拔原材料和冷拔变形后断裂的301奥氏体不锈钢进行全面分析。分析结果表明:发生断裂的根本原因是形变诱导发生相变而产生马氏体...利用金相分析、力学性能测试、显微硬度分析、Image Pro Plus马氏体覆盖分析和J-Matpro性能模拟预测分析对冷拔原材料和冷拔变形后断裂的301奥氏体不锈钢进行全面分析。分析结果表明:发生断裂的根本原因是形变诱导发生相变而产生马氏体,马氏体强度高、硬度高、塑性低,因此在冷拔变形力的作用下容易发生断裂。经过1 080℃保温60 min的固溶处理后,发生相变的组织重新回复到晶粒度6.0级的奥氏体组织,同时其强度、硬度降低,延伸率提高。展开更多
The effect of strain and drawing temperature on the evolution of microstructure and fiber textures of aluminum wiresdrawn at room temperature and cryogenic temperature was investigated by TEM and EBSD observations.The...The effect of strain and drawing temperature on the evolution of microstructure and fiber textures of aluminum wiresdrawn at room temperature and cryogenic temperature was investigated by TEM and EBSD observations.The results show that lowangle boundaries frequency increases and high angle boundaries frequency decreases with strain increasing when the strain is low.Athigh strain,most of grain and dislocation boundaries are parallel to the drawn direction and low angle boundaries frequencydecreases and high angle boundaries frequency increases with strain increasing.The decrease of deformation temperature leads tomicrostructure finer and low angle boundaries frequency increasing.Texture analysis indicates that volume fraction of complextexture component decreases with strain increasing and a mixture of?111?and?100?fiber texture forms at high strain.?111?is stableat low strains but?100?becomes stable at high strain.The decrease of temperature can enhance the stability of?111?orientation athigh strain.展开更多
文摘利用金相分析、力学性能测试、显微硬度分析、Image Pro Plus马氏体覆盖分析和J-Matpro性能模拟预测分析对冷拔原材料和冷拔变形后断裂的301奥氏体不锈钢进行全面分析。分析结果表明:发生断裂的根本原因是形变诱导发生相变而产生马氏体,马氏体强度高、硬度高、塑性低,因此在冷拔变形力的作用下容易发生断裂。经过1 080℃保温60 min的固溶处理后,发生相变的组织重新回复到晶粒度6.0级的奥氏体组织,同时其强度、硬度降低,延伸率提高。
基金Projects(51471123,51171135)supported by the National Natural Science Foundation of ChinaProjects(2012K07-08,2013KJXX-61)supported by the Natural Science Foundation of Shaanxi Province,ChinaProject(2013JC14)supported by the Industrialization Program of Shaanxi Province,China
文摘The effect of strain and drawing temperature on the evolution of microstructure and fiber textures of aluminum wiresdrawn at room temperature and cryogenic temperature was investigated by TEM and EBSD observations.The results show that lowangle boundaries frequency increases and high angle boundaries frequency decreases with strain increasing when the strain is low.Athigh strain,most of grain and dislocation boundaries are parallel to the drawn direction and low angle boundaries frequencydecreases and high angle boundaries frequency increases with strain increasing.The decrease of deformation temperature leads tomicrostructure finer and low angle boundaries frequency increasing.Texture analysis indicates that volume fraction of complextexture component decreases with strain increasing and a mixture of?111?and?100?fiber texture forms at high strain.?111?is stableat low strains but?100?becomes stable at high strain.The decrease of temperature can enhance the stability of?111?orientation athigh strain.
