Paper Title:
Mechanical Assessment of Dissimilar Diffusion Joints of CP-Ti to Stainless Steel
  Abstract

Dissimilar joints between CP-Ti and 304stainless steel were produced using diffusion welding technique in the temperature range of 800-950 °C, under a uniaxial pressure of 7 MPa in argon atmosphere. Mechanical assessment of the joints was carried out employing shear testing. The shear strength was found to be a function of joint surface area and volume fraction of brittle intermetallic phases such as σ, FeTi, and Fe2Ti which were detected by scanning electron microscopy and energy dispersive spectroscopy. Increasing the temperature and time of the diffusion welding process increased joint surface area and accelerated elemental diffusion across the joint interface which enhanced the shear strength value. However, as the volume fraction of the brittle intermetallic phases and Kirkendall voids increased at higher temperature and time, the bond shear strength decreased. Optimum shear strength was found to be 168 MPa which related to the joint produced at temperature and time of 900°C and 30 min, respectively.

  Info
Periodical
Advanced Materials Research (Volumes 264-265)
Edited by
M.S.J. Hashmi, S. Mridha and S. Naher
Pages
1737-1745
DOI
10.4028/www.scientific.net/AMR.264-265.1737
Citation
M.R. Soltan Mohammadi, S.F. Kashani Bozorg, "Mechanical Assessment of Dissimilar Diffusion Joints of CP-Ti to Stainless Steel", Advanced Materials Research, Vols. 264-265, pp. 1737-1745, 2011
Online since
June 2011
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Price
$32.00
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