Deformation and dissolution of cementite by severe plastic deformation

被引：0
|
作者：
Umemoto, M [1 ]
Todaka, Y [1 ]
Ohno, A [1 ]
Suzuki, M [1 ]
Tsuchiya, K [1 ]
机构：
[1] Toyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 4418580, Japan
来源：
Metastable, Mechanically Alloyed and Nanocrystalline Materials | 2005年 / 24-25卷
关键词：
cementite; pearlite; deformation; dissolution; mechanical properties; characterization;
D O I：
10.4028/www.scientific.net/JMNM.24-25.157
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
Deformation and dissolution behavior of cementite in eutectoid steels with pearlitic and spheroidite structures were studied using high resolution SEM-EBSP and TEM. In rolled pearlite, cementite lamellae showed bending, sliding slip, smooth thinning, necking, fragmentation and fracture. Complete dissolution of cementite lamellae and cementite particles was observed in specimens deformed by a ball drop test, particle impact experiment and shot peening. The dissolution of cementite is always accompanied by the nanocrystallization of ferrite. New mechanisms underlying cementite dissolution by deformation are proposed to explain a sudden disappearance of spheroidal cementite.
引用
收藏
页码：157 / 160
页数：4
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