The texture evolution,twin crystallographic nature and grain orientation variation during the solution heat treatment process of the 304 stainless steel pipe were studied.It was found that after the solution heat trea...The texture evolution,twin crystallographic nature and grain orientation variation during the solution heat treatment process of the 304 stainless steel pipe were studied.It was found that after the solution heat treatment,the texture type clearly changed,and the texture strength was greatly increased.During the solution heat treatment process,grain boundaries migrated along the orientation available for grain growth,giving rise to abnormal growth of some grains through merging with the adjacent small grains.After the solution heat treatment,more<111>60°twins formed in the microstructures of the 304 stainless steel pipe,and the fraction of the twin boundaries showed a pronounced increase.Analysis of the twin crystallographic nature of the FCC crystals showed that four kinds of twin variants can be formed within austenite parent grains,and twelve kinds of misorientations can be formed between the austenite parent grains and the secondary twins.展开更多
A secondary twinning orientation relationship between A and B martensite variants in a CuZnAl shape memory alloy was confirmed under TEM observation.The twin plane, (50),is a linear combination of (8)and(1 0 10)planes...A secondary twinning orientation relationship between A and B martensite variants in a CuZnAl shape memory alloy was confirmed under TEM observation.The twin plane, (50),is a linear combination of (8)and(1 0 10)planes,which are twin planes of A:C and A:D type pair respectively.展开更多
基金Project(51875547)supported by the National Natural Science Foundation of China。
文摘The texture evolution,twin crystallographic nature and grain orientation variation during the solution heat treatment process of the 304 stainless steel pipe were studied.It was found that after the solution heat treatment,the texture type clearly changed,and the texture strength was greatly increased.During the solution heat treatment process,grain boundaries migrated along the orientation available for grain growth,giving rise to abnormal growth of some grains through merging with the adjacent small grains.After the solution heat treatment,more<111>60°twins formed in the microstructures of the 304 stainless steel pipe,and the fraction of the twin boundaries showed a pronounced increase.Analysis of the twin crystallographic nature of the FCC crystals showed that four kinds of twin variants can be formed within austenite parent grains,and twelve kinds of misorientations can be formed between the austenite parent grains and the secondary twins.
文摘A secondary twinning orientation relationship between A and B martensite variants in a CuZnAl shape memory alloy was confirmed under TEM observation.The twin plane, (50),is a linear combination of (8)and(1 0 10)planes,which are twin planes of A:C and A:D type pair respectively.
