Microstructure of reverted austenite in Fe-0.3N martensite
Microstructure of reverted austenite in Fe-0.3N martensite
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DOI：
10.1016/j.scriptamat.2018.07.020
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发表时间：
2018-11
影响因子：
6
通讯作者：
Mitsutaka Sato;S. Matsumoto;G. Miyamoto;T. Furuhara
中科院分区：
文献类型：
--
作者：
Mitsutaka Sato;S. Matsumoto;G. Miyamoto;T. Furuhara
研究了 Fe-0.3mass%N 二元合金在临界退火过程中的逆相变行为。在回复过程中形成针状和球状奥氏体两种形态。球状奥氏体与相邻原奥氏体晶粒的一侧具有几乎相同的取向，并生长成与Kurdjumov-Sachs取向关系（K-S OR）有较大偏差角的马氏体。另一方面，针状奥氏体与其周围的马氏体基体保持接近 K-S OR。通过简单的临界退火，由于氮富集到回复奥氏体中，获得了大量的残余奥氏体。
Reverse transformation behavior during intercritical annealing was studied in Fe-0.3 mass%N binary alloy. Two morphologies of acicular and globular austenite are formed during reversion. The globular austenite has almost same orientation with one side of adjacent prior austenite grain and grows into the martensite with larger deviation angle from Kurdjumov-Sachs orientation relationship (K-S OR). On the other hand, the acicular austenite holds a near K-S OR with its surrounding martensite matrix. A large amount of retained austenite was obtained by a simple intercritical annealing due to enrichment of nitrogen into reverted austenite.