Significance of intercritical annealing temperature on the impact behavior of Fe-7Mn-4Al-0.18C steel

被引:5
作者
Mohapatra, Sudipta [1 ]
Das, Karabi [1 ]
Das, Siddhartha [1 ]
机构
[1] Indian Inst Technol Kharagpur, Dept Met & Mat Engn, Kharagpur 721302, West Bengal, India
关键词
Metals and alloys; Microstructure; Medium manganese steel; Intercritical annealing; Impact energy; TRIP effect;
D O I
10.1016/j.matlet.2023.134418
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The current study examines the impact behavior of thermomechanically processed Fe-6.78Mn-3.92Al-0.18C (wt. %) steel after intercritical annealing at 700, 750 and 800 degrees C. The formation of a multi-phase microstructure with blocky and lath-type reverted austenite (RA)/martensite (M), fine intercritical ferrite (IF), and coarse elongated ferrite (EF) is revealed by electron backscatter diffraction (EBSD). When subjected to the Charpy-impact test, the sample annealed at 750 degrees C shows the highest impact energy owing to high transformation-induced-plasticity (TRIP) effect. To further comprehend the micro-mechanism of fracture, the fracture surface is also examined by scanning electron microscopy (SEM).
引用
收藏
页数:4
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