Characteristic of non-continuous precipitated phase in AZ91HP
WANG Yue
WU Wei
LIU Zheng
SONG De-ren
LI Feng
LIU Chong-yang
Abstract：The divorce associate coarse β-Al12Mg17 distributed along the grain boundary will dissolve in the base to form supersaturated solid solution of α-Mg when AZ91HP die casting was dheated to 415℃ for 8 hours and then quenched.The β-Al12Mg17 will precipitated aa scontinuous and non-continuous form during artificial aging.Non-continuous β-Al12Mg17 precipitates earlier and more than continuous β-Al12Mg17.The morphology and amount of non-continuous β-Al12Mg17 changed with aging time and had a great effect on the properties of the alloy.The microstructure observation shown that nucleation of non-continuous β-Al12Mg17 precipitated as the granules along the grain boundaries first,and then it grew up and changed the morphology into the mixture of block and cell,finally the blocks of Al12Mg17 disappeared and the cells extended into the crystal grains.Along with the course of precipitations its morphology changed and the mechanical properties of AZ91HP were also changed and shown obvious precipitation hardening.
Keywords：magnesium base alloyheat treatmentmechanical properties
Publication Date：2000-10-31
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 467-470 )