Development of Ultrafine Lamellar Ferrite and Austenite Duplex Structure in 0.2C5Mn Steel during ART-annealing
Development of Ultrafine Lamellar Ferrite and Austenite Duplex Structure in 0.2C5Mn Steel during ART-annealing
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DOI：
10.2355/isijinternational.51.651
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发表时间：
2011-01-01
影响因子：
1.8
通讯作者：
Cao, Wen Quan
中科院分区：
文献类型：
--
作者：
Wang, Chang;Shi, Jie;Cao, Wen Quan
通过 TEM 和 STEM 检查了 Fe-0.2C-5Mn 钢在保温时间长达 144 小时的临界退火过程中的微观结构演变。 TEM表明马氏体板条结构逐渐转变为片状铁素体和奥氏体双相组织。通过 STEM 发现锰从铁素体到奥氏体的分配。通过电子背散射衍射（EBSD）观察到奥氏体板条和铁素体板条之间典型的库尔朱莫夫-萨克斯取向关系。基于对奥氏体板条增厚行为的分析，提出奥氏体中Mn配分主导了退火过程中超细片状铁素体和奥氏体双相组织的微观结构演化。
The microstructural evolution of Fe-0.2C-5Mn steel during intercritical annealing with holding time for up to 144 hours was examined by TEM and STEM. It was demonstrated by TEM that the martensite lath structure gradually transformed into a lamellar ferrite and austenite duplex structure. The partitioning of manganese from ferrite to austenite was found by STEM. Typical Kurdjumov-Sachs orientation relationship between austenite lath and ferrite lath was observed by electron back scattered diffraction (EBSD). Based on the analysis of the austenite lath thckening behavior, it was proposed that the Mn-partitioning in austenite dominated the microstructure evolution of the ultrafine lamellar ferrite and austenite duplex structure during annealing process.