Paper Title:
Creep and High Temperature Fatigue Resistance of Ti-6Al-4V Modified by Duplex Plasma Carburization/CrN Coating
  Abstract

In this study, a newly developed duplex coating method incorporating plasma carburization and CrN coating was applied to Ti-6Al-4V and its effects on the creep and high temperature fatigue were investigated. The creep resistance was enhanced significantly by the duplex surface treatment. The stress exponent and the activation energy for creep of duplex-surfacetreated Ti-6Al-4V at 510~550°C were measured to be 8.0-9.5 and 230 to 280 kJ/mol, respectively. Both the stress exponent and the activation energy were not appreciably changed by surface modification suggesting that the creep deformation mechanism is not modified by the surface treatments, but rather dominated by the deformation of the Cu matrix. In the temperature range of the present study, the β phase acts as an athermal obstacle and increases the athermal strengthening component, which would increase the creep resistance and the stress exponent. Since the creep deformation proceeds by overcoming thermal obstacles in the matrix, the activation energy is not appreciably modified by the presence of the β phase. The fatigue of duplex-surface-treated Ti-6Al- 4V improved significantly over that its non surface-treated counterpart. The initiation of fatigue cracks is likely to be retarded more effectively by the presence of hard and strong Cr layers on the surface, resulting in life time enhancement.

  Info
Periodical
Solid State Phenomena (Volume 118)
Edited by
Jang Hyun Sung, Chan Gyu Lee, Yong Zoo You, Young Kook Lee and Jae Young Kim
Pages
515-520
DOI
10.4028/www.scientific.net/SSP.118.515
Citation
Y.G. Park, M.Y. Wey, S. I. Hong, M. Ikenaga, "Creep and High Temperature Fatigue Resistance of Ti-6Al-4V Modified by Duplex Plasma Carburization/CrN Coating", Solid State Phenomena, Vol. 118, pp. 515-520, 2006
Online since
December 2006
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: Cui Li, Wei Qi, Kutsuna Muneharu
Abstract:A zircon coating was applied on the surface of Ti-6Al-4V alloy by plasma spray and its effect on the high temperature tensile properties of...
547
Authors: Ri Sheng Du, Ji Hua Peng, Xian Wen Liang, Jun Tian
Abstract:In this paper, the TiN/TiAlN duplex coatings were deposited on SKH51 tool steel by means of multi-arc ion plating. By means of SEM, Vickers...
402
Authors: Ming Zhu, Mei Shuan Li
Abstract:Cr-Al-N coatings were deposited on the surface of the (111) single silicon for the aim to study the thermal stability of this kind of...
249
Authors: Satoru Takahashi, Masaki Hatano, Yoshitaka Kojima, Yoshio Harada, Akira Kawasaki, Fumio Ono
Abstract:Thermal cycle resistance of Ni-20Cr, Ni-50Cr and CoNiCrAlY coatings produced by air plasma spraying was investigated according to Japanese...
296
Authors: Ren Guo Song, Pu Hong Tang, Chao Wang, Guo Lu
Chapter 2: Surface Engineering/Coatings
Abstract:Al2O3 and Al2O3-40wt.%TiO2 ceramic coatings on H13 hot-worked die steel have been...
235