کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10620149 988593 2013 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Grain boundary embrittlement by Mn and eutectoid reaction in binary Fe-12Mn steel
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Grain boundary embrittlement by Mn and eutectoid reaction in binary Fe-12Mn steel
چکیده انگلیسی
The grain boundary embrittlement in a binary Fe-12Mn is due to the grain boundary segregation of Mn. During tempering at 400 °C (higher than the equilibrium eutectoid reaction temperature 247 °C), reverted austenite particles were formed at lath and grain boundaries through the equilibrium reaction of lath martensite to ferrite + austenite. Surprisingly, hydrostatic pressure, which is induced by the transformation of epsilon martensite to austenite during heating at the tempering temperature, resulted in the nonequilibrium eutectoid reaction producing α-Mn precipitates at the interface between lath martensite and the transformed austenite during the tempering. The segregation concentration kinetics of Mn formed a convex profile due to the active grain boundary precipitation of the reverted austenite particles and the α-Mn particles, which act as a sink for the segregated Mn. Finally, the convex segregation profile of Mn corresponded to the concave profile of intergranular fracture strength.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 61, Issue 11, June 2013, Pages 4022-4034
نویسندگان
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