Paper Title:
Microstructure and Wear Behaviour of Laser Induced In-Situ Formation of TiBx and TiC Titanium Composite Coatings
  Abstract

Two kinds of mixed powders:Ti-6Al-4V/B/C and Ti-6Al-4V/B4C which are pre-pasted on Ti-6Al-4V substrates separately were scanned by a 500W pulsed YAG laser to induce in situ formation of titanium composite coatings contained TiBx and TiC ceramic reinforced phases. The influences of laser processing parameters including Pulse Frequency (PF), Pulse Width (PW), Laser Power (P) and Scanning Speed (V) together with the powder proportions on the microstructure and properties of the coatings were investigated. Microstructure, phase components and micro-hardness of the coating were analyzed by OM, SEM, TEM, XRD and micro-hardness tester respectively. The optimized processing parameters of a single path laser scanned specimen in this case are as follows: PF: 15Hz, PW: 3ms, for the Ti-6Al-4V/B4C specimens the laser line energy ~12.5J/mm, for the Ti-6Al-4V/B/C specimens the laser line energy ~11J/mm. TiB and TiC ceramic were formed evenly reinforced in the matrix of Ti-6Al-4V with the morphology of needle, tiny dendrites and disperse spherical particles. The maximum micro-hardness of single-path layers is up to 750 Hv, which is over twice of that of the substrate (367Hv).The wear weight loss decreased nearly 3 times that of the substrate.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
1868-1871
DOI
10.4028/www.scientific.net/MSF.654-656.1868
Citation
J. Liang, C. X. Ren, C. S. Liu, S. Y. Chen, "Microstructure and Wear Behaviour of Laser Induced In-Situ Formation of TiBx and TiC Titanium Composite Coatings", Materials Science Forum, Vols. 654-656, pp. 1868-1871, 2010
Online since
June 2010
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: Jian Li Song, Qi Lin Deng, C.Y. Chen, De Jin Hu
Abstract:Experimental study on the laser direct fabrication (LDF) of stainless steel powder is carried out. Microstructure and properties of the...
239
Authors: Jian Li Song, Yong Tang Li, Qi Lin Deng, Zhong Yang Cheng, Bryan Chin
Abstract:Laser cladding rapid manufacturing technology is a kind of new developed advanced manufacturing technology integrating the advantages of...
413
Authors: S. Mridha, S. Dyuti
Abstract:In order to modify surface structure titanium powder was preplaced on steel surface and melted under TIG (tungsten inert gas) torch in a pure...
1421
  | Authors: Rui Vilar, Edson Costa Santos
Abstract:In the present work single and multiple layer NiCrAlY coatings were produced by laser cladding on (100) single-crystalline substrates of...
503
Authors: Jian Wei Mao, Yuan Fei Han, Wei Jie Lu, Li Qiang Wang
Chapter 4: Advanced Metal Matrix Composites
Abstract:The weldability of in-situ titanium matrix composites (TMCs) was studied using the gas tungsten arc welding (GTAW). The effects of GTAW on...
436