Effects of superplastic deformation on the diffusion welding of SuperDux 65 stainless steel
Abstract
The SuperDux 65 stainless steel diffusion welded in a nonsuperplastic state (880 C, 60 min) required greater pressure, compared to aluminum and titanium alloys, to create a contact area at the weld interface, which will increase the atomic diffusion paths. However, an unsatisfactory weld strength of 45.3 MPa was obtained under the applied pressure of 7 MPa. This alloy deformed easily at its superplastic temperature of 970 C, resulting in a tight contact surface. The higher welding temperature was also beneficial for atomic diffusion. Both effects were advantageous for diffusion welding, while the joined workpieces macroscopically deformed markedly. In this study, a two-stage diffusion welding method was proposed. The specimens were diffusion welded in a nonsuperplastic (or superplastic) state for a short time and then further diffusion welded at superplastic (or nonsuperplastic) temperatures for a longer heating period. It was found that the welding strength could be improved drastically using such a two-stage process. The contributions of superplastic deformation on the diffusion welding of this alloy during the two-stage process were clarified.
- Authors:
-
- Chung-Hua Univ., Hsinchu (Taiwan, Province of China). Dept. of Mechanical Engineering
- National Taiwan Univ., Taipei (Taiwan, Province of China). Inst. of Materials Science and Engineering
- Publication Date:
- OSTI Identifier:
- 687473
- Resource Type:
- Journal Article
- Journal Name:
- Welding Journal
- Additional Journal Information:
- Journal Volume: 78; Journal Issue: 9; Other Information: PBD: Sep 1999
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; CHROMIUM-NICKEL STEELS; DEFORMATION; PLASTICITY; SHEAR PROPERTIES; DIFFUSION WELDING
Citation Formats
Yeh, M S, Tseng, Y H, and Chuang, T H. Effects of superplastic deformation on the diffusion welding of SuperDux 65 stainless steel. United States: N. p., 1999.
Web.
Yeh, M S, Tseng, Y H, & Chuang, T H. Effects of superplastic deformation on the diffusion welding of SuperDux 65 stainless steel. United States.
Yeh, M S, Tseng, Y H, and Chuang, T H. 1999.
"Effects of superplastic deformation on the diffusion welding of SuperDux 65 stainless steel". United States.
@article{osti_687473,
title = {Effects of superplastic deformation on the diffusion welding of SuperDux 65 stainless steel},
author = {Yeh, M S and Tseng, Y H and Chuang, T H},
abstractNote = {The SuperDux 65 stainless steel diffusion welded in a nonsuperplastic state (880 C, 60 min) required greater pressure, compared to aluminum and titanium alloys, to create a contact area at the weld interface, which will increase the atomic diffusion paths. However, an unsatisfactory weld strength of 45.3 MPa was obtained under the applied pressure of 7 MPa. This alloy deformed easily at its superplastic temperature of 970 C, resulting in a tight contact surface. The higher welding temperature was also beneficial for atomic diffusion. Both effects were advantageous for diffusion welding, while the joined workpieces macroscopically deformed markedly. In this study, a two-stage diffusion welding method was proposed. The specimens were diffusion welded in a nonsuperplastic (or superplastic) state for a short time and then further diffusion welded at superplastic (or nonsuperplastic) temperatures for a longer heating period. It was found that the welding strength could be improved drastically using such a two-stage process. The contributions of superplastic deformation on the diffusion welding of this alloy during the two-stage process were clarified.},
doi = {},
url = {https://www.osti.gov/biblio/687473},
journal = {Welding Journal},
number = 9,
volume = 78,
place = {United States},
year = {Wed Sep 01 00:00:00 EDT 1999},
month = {Wed Sep 01 00:00:00 EDT 1999}
}