Nd:YAG laser weldability of RS/PM Al-8Fe-2Mo sheet
The microstructure, mechanical properties and fracture characteristics of a pulsed Nd:YAG laser weld in a rapid solidification/powder metallurgy (RS/PM) Al-8 wt % Fe-2.3 wt % Mo alloy have been investigated. Results showed the high power density but low total energy input associated with pulsed Nd:YAG laser welding to promote extremely rapid fusion zone (FZ) cooling rates in the vicinity of 10/sup 5//degree/C/s. The weld FZ microstructure consisted primarily of submicron-sized spherical dispersoids in a matrix of fine dendritic-alpha aluminum. A dispersoid-coarsened heat-affected zone (HAZ) was also observed in the boundary between successive, overlapping melt zones. Transverse-weld tensile testing found fracture to occur in the unaffected base metal indicating 100% weld joint efficiency. Longitudinal-weld bend ductility testing revealed fracture initiation and propagation to be associated with the HAZ between successive melt zones at a bend ductility level only marginally below that of the base metal. 12 refs., 7 figs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6301967
- Report Number(s):
- SAND-89-1317C; CONF-8905118-7; ON: DE89013588
- Country of Publication:
- United States
- Language:
- English
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Weldability of a RS-PM Al-8Fe-2Mo alloy
Weldability of a rapid solidification/powder metallurgy Al-8Fe-2Mo alloy
Related Subjects
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM BASE ALLOYS
CRYSTAL STRUCTURE
DUCTILITY
FRACTURE PROPERTIES
IRON ALLOYS
LASERS
MECHANICAL PROPERTIES
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NEODYMIUM LASERS
SHEETS
SOLID STATE LASERS
TENSILE PROPERTIES
WELDABILITY