Influence of Aluminum Content on Grain Refinement and Strength of AZ31 Magnesium GTA Weld Metal

Conference · Thu Jun 28 00:00:00 EDT 2012

OSTI ID:1044870

Babu, N Kishore ^[1]; Cross, Carl E ^[2]

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1. Singapore Institute of Manufacturing Technology
2. Los Alamos National Laboratory

The goal is to characterize the effect of Al content on AZ31 weld metal, the grain size and strength, and examine role of Al on grain refinement. The approach is to systematically vary the aluminum content of AZ31 weld metal, Measure average grain size in weld metal, and Measure cross-weld tensile properties and hardness. Conclusions are that: (1) increased Al content in AZ31 weld metal results in grain refinement Reason: higher undercooling during solidification; (2) weld metal grain refinement resulted in increased strength & hardness Reason: grain boundary strengthening; and (3) weld metal strength can be raised to wrought base metal levels.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: BAM, Germany
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1044870
• Report Number(s): LA-UR-12-22558; TRN: US201214%%541
• Resource Relation: Conference: Trends in Welding Research ; 2012-06-04 - 2012-06-08 ; Chicago, Illinois, United States
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
ALUMINIUM
GRAIN REFINEMENT
GRAIN SIZE
HARDNESS
MAGNESIUM
SOLIDIFICATION
TENSILE PROPERTIES
WELDING