STRAIN RATE SENSETIVITY OF EQUAL-CHANNELANGULARLY PRESSED S-5Sb ALLOY DETERMINED BY SHEAR PUNCH TEST
Publish Year: 1390
Type: Conference paper
Language: English
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UFGNSM03_190
Index date: 1 July 2017
STRAIN RATE SENSETIVITY OF EQUAL-CHANNELANGULARLY PRESSED S-5Sb ALLOY DETERMINED BY SHEAR PUNCH TEST abstract
The strain rate sensitivity indices of a fine-grained Sn-5 wt.% Sb alloy processed by equal-channel angular pressing (ECAP), were investigated by shear punch testing (SPT) at room temperature. This localized testing technique is capable of acquiring reliable information on the shear deformation behavior of materials at different strain rates. Results showed that the strain rate sensitivity of the alloy was significantly strain dependent, increasing from 0.15 after 1 pass to 0.6 after 4 passes of ECAP. The observed behavior is attributed to the microstructural changes which occur during progressive deformation in the ECAP process. The microstructural homogeneity increased with increasing the number of ECAP passes, and the grain size decreased from 11 pm after 1 pass to 2.5 um after 4 passes of ECAP. The deformation response of the material after 4 passes of ECAP was characterized by strain rate sensitivity indices of o.1 to 0.6, which conforms to regions I, II and III, typical of superplastic behavior.
STRAIN RATE SENSETIVITY OF EQUAL-CHANNELANGULARLY PRESSED S-5Sb ALLOY DETERMINED BY SHEAR PUNCH TEST Keywords:
STRAIN RATE SENSETIVITY OF EQUAL-CHANNELANGULARLY PRESSED S-5Sb ALLOY DETERMINED BY SHEAR PUNCH TEST authors
REZA MAHMUDI
School of Metallurgical and Materials Engineering, College of Engineering University of Tehran, Tehran, Iran
REZA ALZADEH
School of Metallurgical and Materials Engineering, College of Engineering University of Tehran, Tehran, Iran
SHEERIN AZHARI
Department of Materials Engineering, University of Toronto, Canada