scholarly journals Embrittlement of Al–Li–Cu–Mg alloys at slightly elevated temperatures: microstructural mechanisms of hardening

2000 ◽  
Vol 289 (1-2) ◽  
pp. 130-142 ◽  
Author(s):  
M.J Starink ◽  
A.J Hobson ◽  
I Sinclair ◽  
P.J Gregson
Keyword(s):  
Elevated Temperatures ◽  
Mg Alloys

Effect of Nd on Microstructures and Properties of AZ31 Wrought Mg Alloy

2007 ◽  
Vol 546-549 ◽  
pp. 301-304
Author(s):  
Wei Qiu ◽  
En Hou Han ◽  
Lu Liu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Elevated Temperatures ◽  
Mg Alloys ◽  
The Other ◽  
Mg Alloy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microstructures And Mechanical Properties ◽  
Re Elements

Addition of RE elements to Al-containing Mg alloys can improve properties of Mg alloys at elevated temperatures. In the present investigation, hot-extruded AZ31+x%Nd. (x=0.1,0.3,0.6and1.0 wt%) wrought Mg alloy were prepared .The effects of Nd on microstructures and mechanical properties at room temperature of new alloy were investigated. The investigation found that Nd can bring about two kind of precipitation phases . One is AlNd phase, the other is AlNdMn phase, which were identified as Al11Nd3 and Al8NdMn4 by X-ray diffraction and TEM.

The Influence of Ge on the Properties of Mg Alloys

2015 ◽  
Vol 647 ◽  
pp. 72-78 ◽  
Author(s):  
Jan Šerák ◽  
Tomáš Kovalčík ◽  
Dalibor Vojtěch ◽  
Pavel Novák
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Ambient Temperature ◽  
Magnesium Alloys ◽  
Elevated Temperatures ◽  
Small Extent ◽  
Mg Alloys ◽  
Alloying Elements ◽  
Combustion Engines ◽  
Thermal Stability Of

Germanium is an element which is used in metallurgy in a very small extent. Much more significant is its use as a semiconductor material. Most of magnesium alloys are usually used for applications at ambient temperature. The significant decrease in mechanical properties is observed already at the temperature higher than 150°C. This is the reason for the effort to prepare a new low-priced magnesium based alloys with improved mechanical properties at elevated temperatures, e.g. for components of combustion engines. Therefore, new unconventional alloying elements are studied for increase the thermal stability of magnesium alloys. The effect of germanium on the microstructure and mechanical properties of Mg-Ge alloys at ambient and elevated temperatures was studied in this paper.

MECHANICAL PROPERTIES OF P/M MATERIALS OF RAPIDLY SOLIDIFIED Al-Co-Mg ALLOYS AT ELEVATED TEMPERATURES

2010 ◽  
Vol 24 (06n07) ◽  
pp. 788-796
Author(s):  
MAKOTO SUGAMATA ◽  
OHKI
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperatures ◽  
Hot Extrusion ◽  
Mg Alloys ◽  
Ingot Metallurgy ◽  
Metal Compounds ◽  
Positive Effects ◽  
Uniform Dispersion ◽  
Rapidly Solidified ◽  
Metallurgy Process

With an aim of obtaining aluminum P/M materials strengthened by dispersion of transition metal compounds and solid solution of Mg , Al -2 mass % Co and Al -5 mass % Co alloys with varied Mg additions of 0, 1 and 5 mass% were prepared by rapid solidification techniques. Rapidly solidified flakes were produced by argon gas atomization and subsequent splat quenching on a water-cooled copper roll. The flakes were consolidated to the P/M (Powder metallurgy process is named as P/M) materials by hot extrusion after vacuum degassing. Cast ingots of these alloys were also hot-extruded under the same conditions to the I/M (Ingot metallurgy process is named as I/M) reference materials. Uniform dispersion of fine intermetallic compounds ( Co 2 Al 9) was observed in all the as-extruded P/M materials. Added Mg was present as the solute in the P/M and I/M materials alloy even after annealing at 773K. The P/M materials containing Mg exhibited higher hardness and strength than those without Mg at room temperature. Tensile strength increased with increasing amount of Mg in the I/M materials at elevated temperatures. However, strength of the P/M materials decreased with addition of Mg at 573K and 673K. According to the steady state creep rate and creep rapture time, the creep resistance of the P/M materials containing Mg was clearly inferior to that of Mg -free alloys. Thus the positive effects of Mg additions on mechanical properties of the P/M materials of Al - Co - Mg alloys disappeared at high temperature.

scholarly journals Solute-dislocation interactions in Al-Mg alloys at elevated temperatures

1988 ◽  
Vol 23 (4) ◽  
pp. 714-714
Author(s):  
D. Stone ◽  
H. Wilson ◽  
R.-C. Kuo ◽  
Che-Yu Li
Keyword(s):  
Elevated Temperatures ◽  
Mg Alloys ◽  
Dislocation Interactions ◽  
Al Mg Alloys

scholarly journals On the Serration in Al-Mg Alloys at Elevated Temperatures

1983 ◽  
Vol 47 (3) ◽  
pp. 231-236 ◽  
Author(s):  
Susumu Ikeno ◽  
Tetuya Watanabe ◽  
Shizuo Tada
Keyword(s):  
Elevated Temperatures ◽  
Mg Alloys ◽  
Al Mg Alloys
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