The Ms temperature and morphology of martensite in Fe-31 Pct Ni-0.23 Pct C alloy
The Ms temperature and morphology of martensite in Fe-31 Pct Ni-0.23 Pct C alloy
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Fe-31 Pct Ni-0.23 Pct C合金中马氏体的Ms温度和形貌
DOI：
10.1007/bf02813278
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发表时间：
1971
期刊：
影响因子：
--
通讯作者：
I. Tamura
中科院分区：
文献类型：
--
作者：
T. Maki;S. Shimooka;I. Tamura
人们对fe - n - i合金中马氏体的形态和亚结构进行了大量的研究。含镍约29 ~ 33%的铁-镍合金中的马氏体呈透镜状，有中脉。随着镍含量的增加（即Ms温度的降低），透镜状马氏体中孪晶区域的范围增大，奥氏体-阿氏体界面变得更直。s-6在过去的50次研究中，马氏体形态的变化被作为化学成分的函数进行了研究，这些结果似乎认为，如果合金的化学成分相同，马氏体的形态和亚结构不会改变。本文表明，即使在同一合金中，马氏体的形貌和亚结构也随着Ms温度（即形成温度）的变化而变化。众所周知，随着奥氏体化温度的降低，Ms温度降低，但奥氏体的化学成分没有变化（奥氏体的热稳定）。在本研究中，几次奥氏体化处理改变了Ms温度，观察到在略低于Ms温度下形成的马氏体形态。采用真空感应熔炼法制备了fe - 30.87% ni - 0.23% C （wt pct）合金。speci -
THERE have been many investigations on the morphology andsubstructure of martensite in F e-N i alloys. 1-6 The martensites in Fe-Nialloys containing about 29 to 33 pct Ni are lenticular with a mid-rib. As the nickelcontent increases (ie, as the Ms temperature decreases), the extent of twinned region in the lenticular martensite increases and the austenitemartensite interface becomes straighter, s-6 In these-50 past investigations, the changes in martensite morphology have been examined as a function of chemical compositions, andthese results seem to have considered that the morphology andsubstructure of martensite do not change if the chemical compositions of alloys are the same. In this paper, it is shown that A the morphology andsubstructure of martensite change oO-I 0 0 with the Ms temperature (ie, the formation tempera- v ture) even in the same alloy. It is well-known that the Ms temperature is depressed with decreasing austenitizing temperature without any changes in the chemical composition of o. the austenite (thermal stabilization of austenite). 7-9 E"~-150 In this research, the Ms temperature was alteredby the several austenitizing treatments, and the morphology of martensites formed at thetemperatures just belowthe Ms was observed. The Fe-30.87 pct Ni-0.23 pct C (wt pct) alloy was preparedby vacuum induction melting. The speci-