TY - JOUR

T1 - Hot workability analysis with processing map and texture characteristics of as-cast TX32 magnesium alloy

AU - Dharmendra, C.

AU - Rao, K. P.

AU - Prasad, Y. V.R.K.

AU - Hort, N.

AU - Kainer, K. U.

PY - 2013/8

Y1 - 2013/8

N2 - Hot deformation behavior of as-cast TX32 (Mg-3Sn-2Ca) alloy has been studied in uniaxial compression in the temperature and strain rate ranges of 300-500 C and 0.0003-10 s-1 with a view to characterize the evolution of microstructure and texture. On the basis of the temperature and strain rate dependence of flow stress, a processing map has been developed and the crystallographic orientation information on the deformed specimens has been obtained from electron back scatter diffraction micro-texture analysis. The processing map revealed two domains of dynamic recrystallization in the temperature and strain rate ranges of (1) 300-350 C and 0.0003-0.001 s -1 and (2) 390-500 C and 0.005-0.6 s-1. Specimens deformed at peak in Domain 1 exhibited maximum intensity of basal poles located at about 35-45 to the compression axis while those deformed at peak in Domain 2 showed near-random texture. Schmid factor analysis of different slip systems operating in the two domains suggests that basal + prismatic slip causes the basal texture in Domain 1 while second-order pyramidal slip randomizes the texture in Domain 2.

AB - Hot deformation behavior of as-cast TX32 (Mg-3Sn-2Ca) alloy has been studied in uniaxial compression in the temperature and strain rate ranges of 300-500 C and 0.0003-10 s-1 with a view to characterize the evolution of microstructure and texture. On the basis of the temperature and strain rate dependence of flow stress, a processing map has been developed and the crystallographic orientation information on the deformed specimens has been obtained from electron back scatter diffraction micro-texture analysis. The processing map revealed two domains of dynamic recrystallization in the temperature and strain rate ranges of (1) 300-350 C and 0.0003-0.001 s -1 and (2) 390-500 C and 0.005-0.6 s-1. Specimens deformed at peak in Domain 1 exhibited maximum intensity of basal poles located at about 35-45 to the compression axis while those deformed at peak in Domain 2 showed near-random texture. Schmid factor analysis of different slip systems operating in the two domains suggests that basal + prismatic slip causes the basal texture in Domain 1 while second-order pyramidal slip randomizes the texture in Domain 2.

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=84878011167&partnerID=8YFLogxK

U2 - 10.1007/s10853-013-7314-9

DO - 10.1007/s10853-013-7314-9

M3 - Journal articles

AN - SCOPUS:84878011167

VL - 48

SP - 5236

EP - 5246

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

IS - 15

ER -