Paper Title:
Low Temperature Superplasticity of Titanium Alloy Processed by Thermohydrogen Treatment
  Abstract

Effects of hydrogen on superplastic deformation behavior were investigated through high temperature tensile experiment in this paper. It is found that reasonable hydrogen contents can improve the superplastic behavior such as lowering flow stress and temperature and increasing m value. While addition of 0.1wt% hydrogen in Ti-6Al-4V alloy, peak flow stress decrease to 53%, deformation temperature decrease 60°C. The influence of hydrogen on microstructure transition by means of optic microscope, SEM, TEM and XRD was also researched. The results show that β phase amounts in the hydrogenated alloy increase with hydrogen contents, while hydrogen contents reach to 0.2wt%, martensite becoming coarser with the increase of hydrogen contents. Moreover, dislocations density of hydrogenated alloy after deformation is lower than that of unhydrogenated alloy because of hydrogen action.

  Info
Periodical
Materials Science Forum (Volumes 551-552)
Edited by
K.F. Zhang
Pages
591-596
DOI
10.4028/www.scientific.net/MSF.551-552.591
Citation
Z. Q. Li, H. L. Hou, Y.Q. Wang, "Low Temperature Superplasticity of Titanium Alloy Processed by Thermohydrogen Treatment", Materials Science Forum, Vols. 551-552, pp. 591-596, 2007
Online since
July 2007
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: Chang Liang Li, Hua Ding, Yong Qing Zhao, Lian Zhou
Abstract:Superplastic forming provides a good way for Ti alloys which are usually difficult to be deformed. Ti75 alloy with a nominal composition of...
2969
Authors: Ivan Zuiko, Marat Gazizov, Rustam Kaibyshev
Chapter 3: Superplastic Materials
Abstract:A commercial AA2519 alloy with a chemical composition of Al-5.64Cu-0.33Mn-0.23Mg-0.15Zr (in wt. %) was subjected to two-step thermomechanical...
278
Authors: Rustam Kaibyshev
Chapter 3: Superplastic Materials
Abstract:The ultrafine grained (UFG) structure with an average size of ∼0.8 μm was produced in an Al-Li-Mg-Sc alloy by equal-channel angular extrusion...
150