Use of Friction Stir Processing for Improving Heat-Affected Zone Liquation Cracking Resistance of a Cast Magnesium Alloy AZ91D

Journal Article · Fri Dec 15 00:00:00 EST 2017 · Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science

DOI:https://doi.org/10.1007/S11663-017-1100-Z· OSTI ID:22856066

Karthik, G. M.; Kottada, Ravi Sankar ^[1]

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1. Indian Institute of Technology Madras, Department of Metallurgical and Materials Engineering, Materials Joining Laboratory (India)

In this work, a cast magnesium alloy AZ91D was friction stir processed. Detailed microstructural studies and Gleeble hot ductility tests were conducted on the as-cast and the FSPed samples to comparatively assess their heat-affected zone liquation cracking behavior. The results show that the use of FSP as a pretreatment to fusion welding can strikingly improve the heat-affected zone liquation cracking resistance of alloy AZ91D by reducing the amount and size of the low-melting eutectic β (Mg{sub 17}Al{sub 12}) as well as by refining the matrix grain size.

• OSTI ID: 22856066
• Journal Information: Metallurgical and Materials Transactions B, Process Metallurgy and Materials Processing Science, Vol. 48, Issue 6; Other Information: Copyright (c) 2017 The Minerals, Metals & Materials Society and ASM International; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1073-5615
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRACKING
DUCTILITY
EUTECTICS
FRICTION
GRAIN SIZE
HEAT AFFECTED ZONE
MAGNESIUM ALLOYS
MELTING
REFINING
WELDING