Microstructure and Mechanical Properties of Mg-9Al-6.5Ca-3Zn-0.6Mn-XNd Alloys Prepared by Spray Forming

Author:

Zhang Guo Wei1,Chen Zheng1,Chen Wei2,Xin Hai Ying2,Zhai Jing2,Guo An Zhen2,Ma Li2,Chen Gang2

Affiliation:

1. Northwesten Polytechnical University

2. Ningbo Branch of Chinese Academy of Ordnance Science

Abstract

The Mg-9Al-3Zn-0.6Mn-xNd alloys, preformed with φ300mm size, has been prepared by spray forming technology under a protective atmosphere. The microstructure and mechanical properties have been investigated by XRD, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and strengths tested mechine. As a result, the precipitate phases in the alloys were the finest when the Nd content was 1% compared the alloys with the Nd content were 2% and 3%, the size of precipitation phases are between 1-2um and there are phases like Mg2Ca,Al2Ca,and MgZn2in the alloys. After extrusion, recrystallization microstructures were found in the alloys. The tensile strengths are between 400-450MPa and the yield strengths are between 350-370MPa respectively as the differences content of Nd in the alloys after heat treatment.

Publisher

Trans Tech Publications, Ltd.

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