TY - JOUR

T1 - Hot working parameters and mechanisms in as-cast Mg-3Sn-1Ca alloy

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

AU - Rao, K. P.

AU - Hort, N.

AU - Kainer, K. U.

PY - 2008/10/15

Y1 - 2008/10/15

N2 - The hot working characteristics of as-cast Mg-3Sn-1Ca alloy have been studied using processing-map technique and the kinetic rate equation. The map exhibited two domains; one in the lower strain rate range (0.0003-0.01 s- 1) and the other in the higher strain rate range (0.1-10 s- 1)-both falling in the same temperature range of 350-550 s- 1. Hot extrusion at 500 °C and a speed corresponding to an average strain rate of 3 s- 1 exhibited dynamically recrystallized microstructure. The estimated apparent activation energy values are higher than those for self-diffusion in pure magnesium suggesting that the large volume fraction of MgSnCa intermetallic particles causes significant back stress.

AB - The hot working characteristics of as-cast Mg-3Sn-1Ca alloy have been studied using processing-map technique and the kinetic rate equation. The map exhibited two domains; one in the lower strain rate range (0.0003-0.01 s- 1) and the other in the higher strain rate range (0.1-10 s- 1)-both falling in the same temperature range of 350-550 s- 1. Hot extrusion at 500 °C and a speed corresponding to an average strain rate of 3 s- 1 exhibited dynamically recrystallized microstructure. The estimated apparent activation energy values are higher than those for self-diffusion in pure magnesium suggesting that the large volume fraction of MgSnCa intermetallic particles causes significant back stress.

KW - Dynamic recrystallization

KW - Hot working

KW - Kinetics

KW - Magnesium alloys

KW - Processing map

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=48449102715&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2008.06.035

DO - 10.1016/j.matlet.2008.06.035

M3 - Journal articles

AN - SCOPUS:48449102715

VL - 62

SP - 4207

EP - 4209

JO - Materials Letters

JF - Materials Letters

SN - 0167-577X

IS - 26

ER -