TY - JOUR
T1 - Effects of aging time on microstructures and mechanical properties of thixoformed AZ63 magnesium alloy
AU - Zhang, Jinyu
AU - Chen, Tijun
AU - Zhang, Suqing
AU - Wang, Bo
AU - Wang, Ruliang
N1 - Publisher Copyright:
©, 2015, Journal Office of Special Casting and Nonferrous Alloys. All right reserved.
PY - 2015/8/20
Y1 - 2015/8/20
N2 - Effects of aging time on microstructures and mechanical properties of thixoforged AZ63 magnesium alloy were invstiagted. The results indicate that aging time affects the precipitation sites, volume fraction and shape of aging precipitation, and finally affects the mechanical properties and fracture behavior. The improvement of mechanical properties is attributed to the dispersion strengthen of continuous precipitation, and the decrease of mechanical properties is resulted from the harmful discontinuous lamellar precipitation. With the aging time increase, the fracture mode is transformed from intergranular into transgranular fracture. With aging at 215℃ for 2 h, the tensile strength reaches 348 MPa, and hardness reaches 69 (HV) with aged for 8 h. Comparing with thixoforged AZ63 alloy, the tensile strength and hardness of the aged alloy are increases by 53% and by 26%, respectively. The fracture morphology is characterized by quasi-cleavage fracture.
AB - Effects of aging time on microstructures and mechanical properties of thixoforged AZ63 magnesium alloy were invstiagted. The results indicate that aging time affects the precipitation sites, volume fraction and shape of aging precipitation, and finally affects the mechanical properties and fracture behavior. The improvement of mechanical properties is attributed to the dispersion strengthen of continuous precipitation, and the decrease of mechanical properties is resulted from the harmful discontinuous lamellar precipitation. With the aging time increase, the fracture mode is transformed from intergranular into transgranular fracture. With aging at 215℃ for 2 h, the tensile strength reaches 348 MPa, and hardness reaches 69 (HV) with aged for 8 h. Comparing with thixoforged AZ63 alloy, the tensile strength and hardness of the aged alloy are increases by 53% and by 26%, respectively. The fracture morphology is characterized by quasi-cleavage fracture.
KW - AZ63 magnesium alloy
KW - Aging time
KW - Mechanical properties
KW - Microstructure
KW - Thixoforming
UR - https://www.scopus.com/pages/publications/84942937016
U2 - 10.15980/j.tzzz.2015.08.014
DO - 10.15980/j.tzzz.2015.08.014
M3 - 文章
AN - SCOPUS:84942937016
SN - 1001-2249
VL - 35
SP - 833
EP - 836
JO - Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys
JF - Tezhong Zhuzao Ji Youse Hejin/Special Casting and Nonferrous Alloys
IS - 8
ER -