Atom Probe and Mssbauer Spectroscopy Investigations of Cementite Dissolution in a Cold Drawn Eutectoid Steel  

作　　者：Na Min Wei Li Hongyan Li Xuejun Jin 

机构地区：[1]School of Materials Science an-d Engineering, Shanghai University, Shanghai 200072, China [2]School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Journal of Materials Science & Technology》2010年第9期776-782,共7页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.50371057)

摘　　要：Mssbauer spectrum and three dimensional atom probes（3DAP） were combined to investigate the mechanism of cementite dissolution in a cold-drawn eutectoid steel at a true strain of 2.89.The experimental results suggest that the dislocations play an important role in the dissolution of the cementite by sweeping across the nano-scaled cementite,and transferring carbon from cementite to ferrite inducing cementite decomposition.The mechanism of cementite dissolution in the steel is discussed in association with the investigation of nonstoichiometric cementite structure after heavy deformation.Mssbauer spectrum and three dimensional atom probes（3DAP） were combined to investigate the mechanism of cementite dissolution in a cold-drawn eutectoid steel at a true strain of 2.89.The experimental results suggest that the dislocations play an important role in the dissolution of the cementite by sweeping across the nano-scaled cementite,and transferring carbon from cementite to ferrite inducing cementite decomposition.The mechanism of cementite dissolution in the steel is discussed in association with the investigation of nonstoichiometric cementite structure after heavy deformation.

关 键 词：Eutectoid steel CEMENTITE Three dimensional atoms probe Mssbauer spectrum 

分 类 号：TG115.215[金属学及工艺—物理冶金] O481.4[金属学及工艺—金属学]