کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7981048 1514743 2014 60 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of the plastic properties of materials treated by ultrasonic surface rolling process through instrumented indentation
ترجمه فارسی عنوان
تعیین خواص پلاستیکی مواد تحت درمان با فرآیند نورد سطح اولتراسونیک از طریق دندانه دار کردن ابزار
کلمات کلیدی
نانو تند، روند نورد سطح التراسونیک، نانوکریستالیزاسیون سطحی، دارایی پلاستیکی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
چکیده انگلیسی
Ultrasonic surface rolling process (USRP) is a novel surface nanocrystallization technique based on severe plastic deformation (SPD). The combination of static extrusion and dynamic impact generates intensive plastic deformation, which leads to the strengthening of the material surface. The present paper aims to investigate the mechanical properties of material surface after USRP. For this purpose, nano-indentation tests were adopted to obtain the load P and penetration depth h. Dimensional analysis of test results (P-h curves) was then performed for determining the microplasticity of the treated material locally. The values of yield strength and strain hardening exponent of the surface layer were calculated and verified by finite-element simulation. Good agreement was obtained between experimental curves and simulated ones. The microstructural evolution of the surface treated by USRP was discussed to interpret the mechanism of surface strengthening. Finally, effects of USRP parameters including static force, vibration amplitude and repeated processing numbers on the variation of plastic parameters in the surface layer were discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 600, 10 April 2014, Pages 21-31
نویسندگان
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