PHASE-TRANSFORMATION IN AN FE-9.0AL-29.5MN-1.2SI ALLOY

被引：16
|
作者：
LIU, TF [1 ]
UEN, GC [1 ]
CHAO, CY [1 ]
LIN, YL [1 ]
WU, CC [1 ]
机构：
[1] NATL CHIAO TUNG UNIV,INST MECH ENGN,HSINCHU,TAIWAN
来源：
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1991年 / 22卷 / 06期
关键词：
D O I：
10.1007/BF02660672
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure of an (alpha + gamma) duplex Fe-9.0Al-29.5Mn-1.2Si alloy has been investigated by means of transmission electron microscopy. In the as-quenched condition, extremely fine D0(3) particles were formed within the ferrite matrix by a continuous ordering transition during quenching. After being aged at 550-degrees-C, the extremely fine D0(3) particles existing in the as-quenched specimen grew preferentially along [100] directions. With increasing the aging time at 550-degrees-C, a (Si, Mn)-rich phase (designated as "L phase") began to appear at the regions contiguous to the D0(3) particles. The L phase has never been observed in various Fe-Al-Mn, Fe-Al-Si, Fe-Mn-Si, and Mn-Al-Si alloy systems before. When the as-quenched specimen was aged at temperatures ranging from 550-degrees-C to 950-degrees-C, the phase transformation sequence occurring within the (alpha + D0(3)) region as the aging temperature increases was found to be (alpha + D0(3) + L phase) --> (alpha + D0(3) + A13 beta-Mn) --> (B2 + D0(3) + A13 beta-Mn) --> (B2 + A13 beta-Mn) --> (alpha + A13 beta-Mn) --> (alpha + gamma) --> alpha.
引用
收藏
页码：1407 / 1415
页数：9
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