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Iranian Journal of Materials Science and Engineering، جلد ۶، شماره ۳، صفحات ۳۵-۴۳
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عنوان انگلیسی COMPUTER AIDED OPTIMIZATION OF SPECIMEN GEOMETRY OF HOT TORSION TEST TO MINIMIZE MICROSTRUCTURE NONHOMOGENEITY AND TEMPERATURE GRADIENT BEFORE DEFORMATION
چکیده انگلیسی مقاله Abstract:Optimization of specimen geometry before subjecting it to hot torsion test (HTT) is essential for minimizingnon-uniform temperature distribution and obtaining uniform microstructure thought the specimen.In the present study, a nonlinear transient analysis was performed for a number of different geometries andtemperatures using the commercial finite element (FE) package ANSYSTM. FE thermal results then were applied tooptimize HTTspecimen produced from API-X 70 microalloyed steel taking into account the microstructurehomogeneity. The thermodynamic software Thermo-calcTM was also used to analysis solubility of microalloyingelements and their precipitates that may exist at different equilibrium conditions. In addition the behavior of austenitegrain size during reheating was investigated. The results show high temperature gradient occurred in long specimens.This could lead to non homogeneous initial austenite grain size and alloying element or precipitates within the gaugesection of the specimen. The proposed optimization procedure can in general be used for other materials and reheatingscenarios to reduce temperature. This then creates more homogeneous initial microstructure prior to deformation andreduces errors in post processing of the HTTresults
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نویسندگان مقاله b میرزاخانی محمدی | b mirzakhani mohammadi
centerof exellence advanced materials and proccessing, school of metallurgy and materials engineering, iran university of science and technology, tehran, iran.

سازمان اصلی تایید شده: دانشگاه علم و صنعت ایران (Iran university of science and technology)

h عربی s h سیدین m r ابوطالبی | h arabi s h seyedein m r aboutalebi


m t صالح | m t saleh


sh خدام | sh khoddam
mechanical engineering department, monash university, clayton campus, vic 3800, australia.
نشانی اینترنتی http://ijmse.iust.ac.ir/browse.php?a_code=A-10-3-101&slc_lang=en&sid=en
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زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده گروه سرامیک
نوع مقاله منتشر شده Research paper
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