کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1582605 1514871 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Orowan strengthening effect on the nanoindentation hardness of the ferrite matrix in microalloyed steels
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Orowan strengthening effect on the nanoindentation hardness of the ferrite matrix in microalloyed steels
چکیده انگلیسی
Although it is well known that there is a significant contribution of precipitation strengthening to the strength of structural steels, it is difficult to experimentally separate the precipitation contribution from the overall strength due to the complex nature of steel microstructures. In this study, the contribution of precipitation strengthening to the matrix strength of ferrite in steel was experimentally investigated through nanoindentation tests. Nanoindentation hardness values of the ferrite matrix in precipitates-containing steels were greater than those in precipitate-free steels, which may be due to the Orowan strengthening mechanism based on the interaction between precipitates and dislocations. To better understand the precipitation strengthening contribution, interparticle spacing values of precipitates were calculated for each microalloyed steel and used for the analysis of hardness change. It was revealed that the trend of nanoindentation hardness change with variation in interparticle spacing corroborated the expectation based on classic Orowan theory.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 487, Issues 1–2, 25 July 2008, Pages 552-557
نویسندگان
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