Atomic Displacement during Bainite Transformation
>It is significant theoretically to study the atomic displacement during bainite transformation. The atomic displacement mode during bainite transformation in medium temperature region was synthetically analyzed in theory. It is pointed out that, in incubation period, the carbon-poor areas come into being by carbon atoms diffusion displacement for the concentration fluctuation. In the carbon-poor area, the bainite ferrite crystal nucleus is generated by heat activation transition of the iron atoms under the driving force of the difference between the old and new phase chemical potential. From the view of thermodynamics, the formation of bainite ferrite is not shear. From the aspects of transformation kinetics and diffusion velocity, the formation of bainite ferrite is not diffusion either. In bainite transformation, the displacement mode of carbon atoms is diffusion, but that of the interface iron atoms is non-synergic thermal activation transition, which results in the formation of bainite ferrite and bainite carbide.
文章引用: 刘宗昌 , 计云萍 , 任慧平 (2013) 贝氏体相变时原子的位移。 材料科学， 3， 243-247. doi: 10.12677/MS.2013.36044
 刘宗昌, 任慧平等 (2009) 贝氏体与贝氏体相变. 冶金工业出版社, 北京.
 刘宗昌, 任慧平 (2007) 过冷奥氏体扩散型相变. 科学出版社, 北京.
 陈昌曙 (2001) 自然辩证法概论新编. 东北大学出版社, 沈阳.
 Aaronson, H.I. (1969) The mechanism of phase transformation in crystalline. Institute of Metals, London.
 刘宗昌, 任慧平, 安胜利等 (2012) 马氏体相变. 科学出版社, 北京.
 方鸿生, 王家军, 杨志刚等 (1999) 贝氏体相变. 科学出版社, 北京.
 Sundquist, B.E. (1968) The edgewise growth of pearlite. Acta Metallurgica, 16, 1413.
 Bhadeshia, H.K.D.H. (2001) Bainite in steels. 2nd Edition, IOM Communications, London.
 林慧国, 傅代直 (1988) 钢的奥氏体转变曲线. 机械工业出版社, 北京.