Paper Title:
Research on Transient Behavior of Aluminium in Laser Micro-Molton Pool
  Abstract

To explore reaction mechanisms and proper effects of aluminium in laser micro-molton pool, experiments of laser cladding (Ti+1-8%Al) on Ti-6Al-4V by pulsed Nd:YAG had been carried out. The microstructures, microhardness and phases of the cladding layers with different weight percentage of Al were investigated. The content of Al was quantitatively determinated when ordering α2 ceramic phase (Ti3Al matrix) were formed. And the friction and wear properties of the cladding layers were examined in atmosphere. It was found that the microstructure of the cladding layers included cellular crystals, columnar crystals, arborescent crystals and dispersive white granules. The α2 ceramic phase was formed when the content of Al was 6%wt. With the increasing of weight percentage of Al, the number and size of arborescent crystals increased obviously, as well as the microhardness, the maximum was 957.9Hv, 1.3-1.5 times of the layers with below 6%wt Al. Inversely, the wear resistance of the laser cladding layers was improved gradually. Friction coefficient, wear extent and wear rate decreased. 0.55-0.7 times of the layers with below 6%wt Al.

  Info
Periodical
Advanced Materials Research (Volumes 284-286)
Chapter
Metal alloy Materials
Edited by
Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu
Pages
1483-1488
DOI
10.4028/www.scientific.net/AMR.284-286.1483
Citation
A. Y. Cui, F. Y. Hu, P. Z. Zhao, C. L. Lu, B. Hu, P. F. Fu, "Research on Transient Behavior of Aluminium in Laser Micro-Molton Pool", Advanced Materials Research, Vols. 284-286, pp. 1483-1488, 2011
Online since
July 2011
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: Feng Jie Tian, Wei Jun Liu, Xiao Feng Shang, Guang Yang
Abstract:The Ni60A powder was clad on the copper by the laser through coaxial power feeding. The hardness and erosion resistance of the substrate and...
125
Authors: Wei Niu, Rong Lu Sun, Yi Wen Lei
Abstract:Self-lubricating h-BN/Ni coating was prepared on a medium carbon steel substrate by CO2 laser cladding using a powder mixture of...
617
Authors: You Feng Zhang, Jun Li
Abstract:In situ reaction synthesized TiB reinforced titanium matrix composites were fabricated using rapid non-equilibrium synthesis techniques of...
398
Authors: Fang You Hu, Ai Yong Cui, Bin Hu, Peng Fei Fu, Pei Zhong Zhao, Chang Liang Lu
New Functional Materials
Abstract:To improve the wear-resistance of Ti600, and alleviate thermal stress as well under hyperthermal and excessive temperature difference...
2093
Authors: Xiao Qin Guo, Jing Bo Chen, Xin Fang Zhang, Yong Kai Wang, Rui Zhang
Chapter 2: Engineering Ceramics and Ceramic Composites
Abstract:Cu-TiB2 composite coatings were in-situ synthesized on the copper substrate by using a Nd: YAG laser. The microstructure of the coating and...
639