Processing,microstructure, and properties of laser-clad Ni alloy FP-5 on Al alloy AA333 |
| |
Authors: | Y Liu J Koch J Mazumder K Shibata |
| |
Affiliation: | (1) Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, 61801 Urbana, IL;(2) Central Engineering Laboratories, Nissan Motor Company, Ltd., 237 Yokosuka, Japan |
| |
Abstract: | This article describes the results of laser cladding Ni alloy FP-5 on Al alloy AA333, microstructure and crystal structure
characterization, and properties of the clad evaluated by Vickers hardness measurement and wear testing. Direct cladding of
Ni alloy on Al alloy creates brittle Ni
x
Al
y
compounds in the interface, which make the interface very brittle, and result in cracking at the interface. The compound
formation is avoided by introducing an intermediate layer of Cu or bronze. The cracking tendency of the clad is prevented
by preheating the substrate to 673 K. The microstructure and crystal structure of the clad and interface are investigated
by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Five phases in the clad layer (including
three new phases) and two phases in the interface are identified by convergent beam electron diffraction (CBED) and selected
area diffraction (SAD) studies. The mechanical properties of the laser-clad Ni alloy are evaluated by Vickers hardness measurements
and wear testing, which show superior results over Cu- and Fe-based alloys. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|