Weldability of a RS-PM Al-8Fe-2Mo alloy

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Welding Journal (Miami); (United States)

OSTI ID:6471935

Sampath, K ^[1]; Baeslack, III, W A ^[2]

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1. Concurrent Technologies Corp., Johnstown, PA (United States)
2. Ohio State Univ., Columbus, OH (United States)

The weldability of a dispersion-strengthened Al-8Fe-2Mo (wt-%) alloy produced via rapid solidification-powder metallurgy (RS-PM) processing was investigated. Electron beam (EB) and pulsed Nd:YAG laser welding conditions were found to have a significant effect on weld solidification behavior, microstructural development and mechanical properties. Microstructural analysis revealed an influence of local thermal conditions (i.e., temperature gradient and cooling rate), macroscopic solid/liquid interface growth rate and the presence of undissolved/unmelted base metal dispersoid particles on solidification phenomena in the fusion zone. Three different types of solidification microstructures, each of which could be observed to varying degrees within a single weld fusion zone, were observed. Superior weld mechanical properties, including joint efficiencies of 100% in pulsed Nd:YAG laser welds, were achieved when high energy density welding conditions produced increasingly refined microstructures.

• OSTI ID: 6471935
• Journal Information: Welding Journal (Miami); (United States), Journal Name: Welding Journal (Miami); (United States) Vol. 72:8; ISSN 0043-2296; ISSN WEJUA3
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
ELECTRON BEAM WELDING
FABRICATION
IRON ALLOYS
JOINING
JOINTS
LASER WELDING
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOLYBDENUM ALLOYS
PHASE TRANSFORMATIONS
SOLIDIFICATION
WELDABILITY
WELDED JOINTS
WELDING