کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1445506 1509594 2015 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Role of stress-assisted martensite in the design of strong ultrafine-grained duplex steels
ترجمه فارسی عنوان
نقش مارتنزیت کمک به استرس در طراحی فولادهای دوبلکس قوی فوق ستاره
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
چکیده انگلیسی

This work explains the occurrence of transformation-induced plasticity via stress-assisted martensite, when designing ultrafine-grained duplex steels. It is found that, when the austenite is reduced to a fine scale of about 300 nm, the initial deformation-induced microstructure can be dominated by parallel lamellae of ε martensite or mechanical twinning, which cannot efficiently provide nucleation sites for strain-induced martensite. Hence, α′ martensite nucleation occurs independently by a stress-assisted process that enhances transformation-induced plasticity in ultrafine-grained austenite. This metallurgical principle was validated experimentally by using a combination of transmission Kikuchi diffraction mapping, transmission electron microscopy and atom probe microscopy, and demonstrated theoretically by the thermodynamics model of stress-assisted martensite.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 82, 1 January 2015, Pages 100–114
نویسندگان
, , , , , , ,