Studies on laser surface melting of Al-11% Si alloy

Biswas, A. ; Mordike, B. L. ; Manna, I. ; Majumdar, J. Dutta (2008) Studies on laser surface melting of Al-11% Si alloy Lasers in Engineering, 18 (1-2). pp. 95-106. ISSN 0898-1507

PDF - Publisher Version

Official URL:


In the present investigation the effect of laser surface melting on wear and corrosion resistance of Al-11 wt.% Si alloy has been investigated. Laser surface melting has been carried out using a 2 kW continuous wave CO2 laser at an applied power of 2.3 kW and scan speed ranging from 6 to 12 mm/min. Following the laser surface melting, a detailed investigation of the melted zone in terms of microstructure, composition and phases were undertaken. Mechanical properties of the melted zone were evaluated so far as the microhardness and wear resistance were concerned. The corro-sion behaviour of the as-received and the laser surface melted surface was evaluated in 1(M) H2SO4, 1(M) HNO3 and 3.56 wt.% NaCl solutions. The microstructure of the melt zone consists of grain refinedAl andAl-Si eutec-tic colonies which results in an improved microhardness from 87 VHN as compared to 55 VHN of the as-received Al-Si alloy. The wear resistance of the melt surface was improved significantly as compared to the as-received Al-Si alloy. A detailed corrosion study in various environments showed that corrosion resistance was marginally less in the 3.56 wt.% NaCl and 1 M H2SO4 solutions, but was better in the 1 M HNO3 solution.

Item Type:Article
Source:Copyright of this article belongs to Old City Publishing, Inc..
Keywords:Aluminium; Silicon; Laser; Melting; Wear; Corrosion
ID Code:18874
Deposited On:17 Nov 2010 12:36
Last Modified:17 May 2016 03:31

Repository Staff Only: item control page