Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2010-07-01

Journal: TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA

Included Journals: ISTIC、EI、SCIE

Volume: 20

Issue: SUPPL. 2

Page Number: S357-S360

ISSN: 1003-6326

Key Words: Mg-Zn-Cu-Zr alloy; yttrium; microstructure; mechanical property

Abstract: The effects of yttrium addition on microstructure and mechanical properties of as-cast Mg-6Zn-3Cu-0.6Zr-xY (x=0, 0.5, 1.0, 1.5 and 2.0, mass fraction, %) (ZCK630+xY for short in this study) alloys were investigated by means of OM, XRD and SEM. The results show that the average grain size of Mg-Zn-Cu-Zr magnesium alloy is effectively reduced (from 57 mu m to 39 mu m) by Y addition. The analysis of XRD indicates the existence of I-phase (Mg(3)Zn(6)Y) and W-phase (Mg(3)Zn(3)Y(2)) in ZCK630 alloys with Y addition. The ultimate tensile strength of ZCK630 alloys is significantly deteriorated with increasing Y addition, which is possibly related to the continuous networks of intergranular phases and the increase of W-phase.