摘要
引入CAM模型,并根据改进了的LFG和Hsu模型,对Fe-Mn-C及Fe-Ni-C合金马氏体相变驱动力进行计算,结果表明符合徐祖耀的计算式2.1σ_(0.2)~γ|M_s+907J/mol。计算了Fe-Mn-C和Fe-Ni-C合金的M_s温度,其结果与实验值符合较好。
The stacking-fault energy (SFE) at M_s temperature in Co, Co-14Ni and Co-3.5Cu alloys are given and the nucleation mechanism of ε-martensite is discussedwith respect to their driving forces. The transformation barrier in pole mechanismmight include the SFE of parent phase as well as the interaction energy betweenimperfect dislocations, the driving force pushes the dislocations to glide with aspeed about 0.4 of that of sound that provides the dynamic energy to overcomethe transformation barrier. The Seeger's pole mechanism may be effective for themetals with higher SFE like Co, but inavailable for the Co-14Ni and Co-3.5Cualloys with low SFE in 10^(-1) order of magnitude in which the spontaneous nu-cleation of fault will be applicable.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1989年第4期A250-A256,共7页
Acta Metallurgica Sinica
基金
国家自然科学基金
