Effect of Process Parameters on Residual Stress Distribution during Direct Laser Metal Deposition Shaping

2014 ◽  
Vol 989-994 ◽  
pp. 49-54
Author(s):  
Hao Wang
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Process Parameters ◽  
Residual Stress Distribution ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Scanning Velocity ◽  
Life And Death ◽  
Direct Laser ◽  
Direct Laser Metal Deposition

In order to improve the quality of sample and decrease the stress during process, it is important to study the residual stress distribution during direct laser metal deposition (LMDS) process. In this paper, according to the “element life and death” technique of finite element method ,with APDL, we simulated the effects of Laser power, scanning velocity, substrate preheat temperature and powder addition speed in top layer of samples residual stress distribution during whole LMDS process are studied. The residual stress distribution under different process parameters is researched in detail. Using the same process parameters, the simulation results show good agreement with the features of sample which fabricated by LMDS.

Effect of Scanning Methods on Residual Stress Distribution during Direct Laser Metal Deposition Shaping

2012 ◽  
Vol 503-504 ◽  
pp. 152-158 ◽  
Author(s):  
Yuan Kong ◽  
Wei Jun Liu ◽  
Yue Chao Wang
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Residual Stress Distribution ◽  
Metal Deposition ◽  
Laser Metal Deposition ◽  
Scanning Method ◽  
Life And Death ◽  
Direct Laser ◽  
Result Show ◽  
Direct Laser Metal Deposition

In order to improve that quality of sample and decrease the stress during process, it is of great importance to study the residual stress distribution during direct laser metal deposition (LMDS) process. In this paper, according to the “element life and death” technique of finite element method ,with APDL, we simulated the effects of long edge reciprocating scanning method, short edge reciprocating scanning method and direction orthogonal changing in different layers reciprocating scanning method to residual stress distribution during whole LMDS process are studied. The residual stress distribution under different scanning methods is researched in detail. Using the same process parameters, the simulation result show good agreement with the features of sample which fabricated by LMDS

A Methodology for Optimization of the Direct Laser Metal Deposition Process

2011 ◽  
Vol 473 ◽  
pp. 75-82 ◽  
Author(s):  
Andrea Angelastro ◽  
Sabina L. Campanelli ◽  
Giuseppe Casalino ◽  
Antonio D. Ludovico ◽  
Simone Ferrara
Keyword(s):  
Optimization Procedure ◽  
Deposition Process ◽  
Metal Deposition ◽  
Hard Coatings ◽  
Full Density ◽  
Laser Metal Deposition ◽  
Scanning Velocity ◽  
3D Cad ◽  
Direct Laser ◽  
Direct Laser Metal Deposition

Direct Laser Metal Deposition (DLMD) is actually one of the most attractive techniques in the group of Material Accretion Manufacturing (MAM) processes. In fact, the DLMD technology is able to realize, to repair and restore, objects, moulds and tools, directly from the 3D CAD model in a rapid and economic way. A great variety of metals, including those very difficult to work with the conventional techniques, can be shaped in a large number of complex geometries. This technique is also well suited to produce very hard coatings. The metallic parts, which are obtained through melting coaxially fed powders with a laser, present very good mechanical properties, with minimum porosity and good adhesion to the substrate. The objective of this work was to optimise the scanning velocity of the laser beam in order to maximize the density of DLMD parts. The optimization procedure was worked out with a mathematical model together with an experimental analysis to study the shape of the track clad generated melting coaxially fed powders with a laser. The material tested was Colmonoy 227-F, a nickel alloy specially designed for manufacturing moulds. The presented methodology has permitted to select the better combination of parameters that produce almost full density parts, free of cracks and well bonded to the substrate sintered parts.

Temperature field and residual stress distribution for laser metal deposition

2018 ◽  
Vol 30 (3) ◽  
pp. 032503 ◽  
Author(s):  
N. Pirch ◽  
M. Niessen ◽  
S. Linnenbrink ◽  
T. Schopphoven ◽  
A. Gasser ◽  
...  
Keyword(s):  
Residual Stress ◽  
Temperature Field ◽  
Stress Distribution ◽  
Residual Stress Distribution ◽  
Metal Deposition ◽  
Laser Metal Deposition
Sign in / Sign up

Export Citation Format

Share Document