Paper Title:
Numerical and Experimental Analysis of Laser Surface Remelting of Al 9wt% Si Alloy Samples
  Abstract

Laser materials processing has been widely applied in industrial processes due to unique precision and very localized thermal action furnished by the laser’s high energy density and power controllability. With the inherent rapid heating and cooling rates to which this surface layer is subjected, this process provides an opportunity to produce different microstructures from that of the bulk metal leading to useful properties. The aim of this work is to develop a heat transfer mathematical model based on the finite difference method in order to simulate temperature fields in the laser surface remelting process. Convective heat transfer in the remelted pool is taken into account by using the effective thermal conductivity approach. Theoretical predictions furnished by previous models from the literature were used for validation of numerical simulations performed with the proposed model. Experiments of laser surface remelting of Al-9 wt pct Si samples was carried out in the present investigation, and numerical simulations was applied for the laser machine operating parameters. The work also encompasses the analysis of microstructural and microhardness variations throughout the resulting treated and unmolten zones.

  Info
Periodical
Materials Science Forum (Volumes 587-588)
Edited by
António Torres Marques, António Fernando Silva, António Paulo Monteiro Baptista, Carlos Sá, Fernando Jorge Lino Alves, Luís Filipe Malheiros and Manuel Vieira
Pages
721-725
DOI
10.4028/www.scientific.net/MSF.587-588.721
Citation
N. Cheung, K. A.S. Cruz, N. H. Khan, A. Garcia, "Numerical and Experimental Analysis of Laser Surface Remelting of Al 9wt% Si Alloy Samples", Materials Science Forum, Vols. 587-588, pp. 721-725, 2008
Online since
June 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Mao Ke Tao, Zong Bao Shen, Cheng Zhang, Kai Wang
Abstract:Laser thermal stress forming is a flexible forming process that forms sheet metal by means of stresses induced by external heat instead of by...
1414
Authors: Gui Jie Liu, Xin Wang, An Jin Li
Abstract:In offshore jacket platforms, the structural steels are widely used and usually welded connected. This paper presents the welding of 45#...
263
Authors: Zong Yin Duan, Dong Sheng Wang
Chapter 12: Laser Processing Technology
Abstract:This paper deals with the microstructure and thermal shock behavior of laser remelting of yttria-stabilized zirconia (YSZ) thermal barrier...
2502
Authors: Eneko Ukar, Aitzol Lamikiz, S. Martínez, Luis Norberto López de Lacalle
Abstract:In laser surface treatment the laser beam is used as energy source for surface modification improving aspects such as mechanical properties,...
127
Authors: Jian Hong Wang, Pei Kang Bai, Zhen Lin Zhang, Yu Xin Li
Chapter 2: Materials Science
Abstract:Laser surface cladding of Ti6Al4V alloy by Ti+Al+C powders (Titanium and carbon powders with an atomic ratio of 1:1 were mixed with 20-60wt.%...
738