Effect of cooling rate on microstructure and deformation behavior of Ti-based metallic glassy/crystalline powders

Wang, D.J., Huang, Y.J., Shen, J., Wu, Y.Q., Huang, H. and Zou, J. (2010) Effect of cooling rate on microstructure and deformation behavior of Ti-based metallic glassy/crystalline powders. Materials Science and Engineering A - Structural Materials Properties Microstructure And Processing, 527 21-22: 5750-5754. doi:10.1016/j.msea.2010.06.019

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Author Wang, D.J.
Huang, Y.J.
Shen, J.
Wu, Y.Q.
Huang, H.
Zou, J.
Title Effect of cooling rate on microstructure and deformation behavior of Ti-based metallic glassy/crystalline powders
Journal name Materials Science and Engineering A - Structural Materials Properties Microstructure And Processing   Check publisher's open access policy
ISSN 0921-5093
Publication date 2010-08
Sub-type Article (original research)
DOI 10.1016/j.msea.2010.06.019
Volume 527
Issue 21-22
Start page 5750
End page 5754
Total pages 5
Place of publication Switzerland
Publisher Elsevier
Collection year 2011
Language eng
Abstract The microstructures and deformation behavior of Ti-based metallic powders were comprehensively investigated. It has been found that, with increasing the powder size, the phase constituent alters from pure glassy to glassy with crystalline phases (face centered cubic structured NiSnZr and hexagonal structured Ti3Sn phases). Our results suggest that the synergetic effect of the thermodynamics and kinetics determines the subsequent characteristics of the crystalline precipitations. Through comparative nanoindentation tests, it was found that the small powders exhibit more pop-in events and a larger pile-up ratio, suggesting that the plastic deformation of the metallic powders is governed by the combined effects of the free volume and the crystallization, which are determined by the cooling rate.
Keyword Glass
Powder Metallurgy
Rapid Solidification
Plasticity
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Sun, 12 Sep 2010, 00:02:34 EST