کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1579543 1514829 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Constrained groove pressing of low carbon steel: Nano-structure and mechanical properties
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Constrained groove pressing of low carbon steel: Nano-structure and mechanical properties
چکیده انگلیسی

In this study a severe plastic deformation method called constrained groove pressing (CGP) is used for imposing a high magnitude of strain into the low carbon steel sheets. Microstructural changes during process are examined by X-ray diffraction and optical observations. The grain size evolution during severe plastic deformation is studied using Williamson–Hall analysis on XRD pattern of the deformed samples. In effective strain of 4.64, ferrite grains with a submicron size of 200–300 nm are achieved. The results show that constrained groove pressing can effectively refine the coarse-grained structure to an ultra fine grain range. Mechanical properties changes due to microstructure evolution are measured by tensile and hardness tests. The results show that the constrained groove pressing process leads to decrease of work hardening rate and increase of strain rate sensitivity of the sheets material. Finally, in cumulative strain of 4.64, a deformed sheet with grain size of 230 nm and ultimate tensile strength of 400 MPa is obtained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 527, Issues 16–17, 25 June 2010, Pages 4043–4049
نویسندگان
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