利用TEM研究了一种低合金钢中马氏体的微结构.研究发现,淬火态的马氏体由铁素体基体和弥散于基体中的高密度纳米小颗粒组成,这种小颗粒的晶体结构可标定为六角结构的ω相.ω相与铁素体基体(α-Fe)的取向关系为:[113]α//[21-1-3-ω,(110)α//(11-01)ω和(2-11-)α//(01-10)ω,点阵常数aω=√2a,cω =√3/2aα.马氏体中的C原子呈非均匀分布,铁素体基体具有很低的C含量,合金中的C原子主要富集在ω相中.
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