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   The Effect of Deformation Temperature on the Mechanical Properties and Microstructural Evolutions of High Manganese Twip Steel  
نویسنده Dini G. ,Shekari H.
منبع International Journal Of Iron And Steel Society Of Iran - 2013 - دوره : 10 - شماره : 2 - صفحه:7 -10
چکیده    In this study, the effect of tensile test temperature (148 to 673 k) on the microstructural evolutions and the mechanicalproperties of high manganese twinning induced plasticity (twip) steel with the chemical composition of fe-31mn-3al-3si (wt. %) was investigated. xrd, sem and tem were used to study the microstructural evolutions.stacking fault energy (sfe) of the alloy was also calculated by a thermodynamic model. the results indicated thatyield strength and tensile strength of steel were gradually decreased with increasing the temperature. however, totalelongation reached a maximum value with increasing the temperature up to 248 k. furthermore, microstructuralinvestigations showed that in the temperature range of 473 to 673 k (sfe: 60-85mj/m2), deformation was mainlycontrolled by dislocation gild and there was no evidence suggesting that twins were formed during deformation.in the temperature range of 248 to 473 k (sfe: 35-60mj/m2), both mechanisms contributed to reacing a maximumductility. in the temperature range of 248 to 148 k (sfe: 20-35mj/m2), twinning and dislocation glide were stillthe dominant deformation mechanisms, but the change in the formation kinetic of twins probably led to decreasein the total elongation.
کلیدواژه Twip Steel ,Deformation Temperature ,Stacking Fault Energy
آدرس University Of Isfahan, ایران, Isfahan University Of Technology, ایران

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