Damage Behavior in Modern Automotive High Strength Dual Phase Steels During Uniaxial Tensile Deformation
Author(s):
Abstract:
In the present research, damage mechanisms during room temperature uniaxial tensile testing of two different modern high strength dual phase steels,DP780 and DP980, were studied. Detailed microstructural characterization of the strained and sectioned samples was performed by scanning electron microscopy (SEM). The results revealed that interface decohesion, especially at the triple junctions of ferrite-ferrite-martensite, was the most probable mechanism for void nucleation. Also, it was found that ductile fracture in these steels was nucleation controlled such that just before ductile fracture incidence, a high density of voids would nucleate or a sudden accelerated void nucleation could happen. Microscopic observations as well as statistical analysis confirmed this phenomenon. Moreover, damage analysis suggested that the void nucleation rate was higher in DP980 than DP780 steel. It seemed to be highly influenced by the morphology and distribution of martensite particles within the ferrite matrix.
Keywords:
Language:
English
Published:
International Journal of iron and steel society of Iran, Volume:10 Issue: 1, Summer and Autumn 2013
Pages:
37 to 42
magiran.com/p1284707
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!