TY - GEN
T1 - Influence of thermal and thermo-mechanical processing on the creep resistance of Mg-10Gd-3Y-0,4Zr alloy
AU - Janik, Vit
AU - Wang, Qu Dong
AU - Yin, Dong Di
AU - Ding, Wen Jiang
PY - 2011
Y1 - 2011
N2 - Alloy Mg-10Gd-3Y-0,4Zr in as-cast, as-extruded, cast-T6 (peak aged) and extruded-T5 (peak aged) state was tensile creep tested at 200, 250 and 300 °C and stress 50, 80 and 120 MPa. Comparison of minimal creep rate shows that alloy Mg-10Gd-3Y-0,4Zr in cast-T6 conditions is characterized by an excellent creep resistance, which is higher than that of commercially available Mg-alloys. Creep resistance of as-cast, as-extruded and extruded-T5 alloy Mg-10Gd-3Y-0,4Zr is lower. Cavity nucleation is heavily affected by the amount of secondary phases on the grain boundaries and also by the initial grain size of the microstructure. After extrusion and in the extruded-T5 conditions creep cavitation was not observed, whereas in the as-cast and cast-T6 conditions creep cavitation occurred on the high fraction of grain boundaries.
AB - Alloy Mg-10Gd-3Y-0,4Zr in as-cast, as-extruded, cast-T6 (peak aged) and extruded-T5 (peak aged) state was tensile creep tested at 200, 250 and 300 °C and stress 50, 80 and 120 MPa. Comparison of minimal creep rate shows that alloy Mg-10Gd-3Y-0,4Zr in cast-T6 conditions is characterized by an excellent creep resistance, which is higher than that of commercially available Mg-alloys. Creep resistance of as-cast, as-extruded and extruded-T5 alloy Mg-10Gd-3Y-0,4Zr is lower. Cavity nucleation is heavily affected by the amount of secondary phases on the grain boundaries and also by the initial grain size of the microstructure. After extrusion and in the extruded-T5 conditions creep cavitation was not observed, whereas in the as-cast and cast-T6 conditions creep cavitation occurred on the high fraction of grain boundaries.
KW - Creep cavity nucleation
KW - Creep failure
KW - Creep resistance
KW - Mg-RE-Zr alloys
KW - Precipitation
UR - https://www.scopus.com/pages/publications/79952545160
U2 - 10.4028/www.scientific.net/MSF.675-677.487
DO - 10.4028/www.scientific.net/MSF.675-677.487
M3 - Conference proceeding
AN - SCOPUS:79952545160
SN - 9783037850497
VL - 675 677
T3 - Materials Science Forum
SP - 487
EP - 490
BT - Advanced Material Science and Technology
T2 - 7th International Forum on Advanced Material Science and Technology
Y2 - 26 June 2010 through 28 June 2010
ER -