贡海
,
章为夷
,
张修睦
金属学报
对分布在Fe-C,Fe-Ni-C及Fe-Cr-Mn-Mo-C合金中奥氏体晶粒界及孪晶界上的马氏体进行了观察分析。结果发现,马氏体易于在奥氏体晶粒界及孪晶界优先形核,并易于沿这些界面长大;在混合马氏体组织中,其界面优先形成的是片状马氏体或蝶状马氏体。
关键词:
马氏体形核、长大
,
martensite growth
,
martensite morphology
,
grain boundary
,
twin boundary
GONG Hai
,
ZHANG Xiumu Department of Materials
,
Dalian Railway Institute
,
Dalian
,
116022 China.Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
110015
,
China.
材料科学技术（英文）
The morphology and substructure of mixed martensites in ferrous alloys have been examined by using optical and transmission electron microscope. The results indicated that the main formation se- quence of martensitic morphology was butterfly→ plate→lath,with decreasing forming temperatures when the plastic accommodation takes place in the parent phase,which is affected by the transforma- tion strain fiélds.It was shown that the martensite morphology is not only decided by the forming temperature alone,but also by the dislocation struc- ture in austenite before the transformation.
关键词:
martensite morphology
,
null
,
null
崔立山
,
杨大智
,
李国斌
,
朱敏
金属学报
Fe-Ni-Co-Ti合金中弥散析出的γ′粒子,当直径在20—50nm时,低温下生成的马氏体具有薄片状马氏体特征;由于γ′粒子的钉扎作用,马氏体界面不光滑.当γ′粒子直径小于5nm时,低温下生成具有良好热弹性的薄片状马氏体;当γ′粒子直径大于5nm,出现断续状马氏体,而且随γ′粒子的长大,断续状马氏体变大,数量增多.当γ′粒子直径为10—15nm时,低温下生成透镜状或蝶状马氏体。
关键词:
FeNiCoTi合金
,
γ′(Ni_3Ti) particle
,
martensite morphology
GONG Hai ZHANG Weiyi Dalian Railway Institute
,
Dalian
,
ChinaZHANG Xiumu Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China
金属学报(英文版)
Martensites distributed along the austenite grain boundaries and twin boundaries have been examined in Fe-C,Fe-Ni-C and Fe-Cr-Mn-Mo-C alloys.The martensites may nucleate preferentially and grow easily along these boundaries.In the mixed martensites,the preferentially formed one is plate or butterfly martensite
关键词:
martensite nucleation
,
null
,
null
,
null
,
null
,
null
