J.H Lee
,
J. Chen
,
S.J. Choe
,
Y.T. Lee and H.M. Kim(High Temperature Materials Laboratory
,
Korea Institute of Machinery & Materials
,
66 Sangnam Dong
,
Changwon
,
Kyungnam
,
641010
,
Korea Manuscript received 26 August 1996)
金属学报(英文版)
The carbide growth behavior of MAR-M247 LC alloy was investigated by directional solidification and quench method. The carbide volume fraction, trapping and growth behavior were correlated with the growth rate.It was found that the carbide volume fraction decreased at slower growth rate.This decreasing was caused by lower solidliquid interface trapping ability at slower growth rate.
关键词:
:carbide
,
null
,
null
,
null
FA N Zhikang (Xi'an University of Technology
,
China)SMALLMANRE(University of Birmingham
,
UK Manuscript received 3 January 1995)
金属学报(英文版)
Carbide formation in austempered ductile iron (ADI) alloyed with Ni and Cu has been studied by use of TEM. The results show that η carbide precipitates in the bainitic ferrite when austempered at 350℃.for 6h, but no carbide was found at the austenite/.ferrite interfaces. When austempered at 300℃, two kinds of. s carbides appear in the bainitic ferrite when austempering time reached I h, and X carbide also precipitates at the austenite /ferrite interfaces when austempering time was extended up to 6h. The bainitic. ferrite and the retained austenite follow the Nishiyama- Wasserman relationship,
关键词:
:carbide
,
null
