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Title: An investigation of diffusion welding of pure and alloyed aluminum to type 316 stainless steel

Abstract

Using silver as an intermediate layer, samples of Type 316 stainless steel specimens were diffusion welded to two aluminum alloys (1100 and 6061) and to 99.999% pure aluminum, utilizing the hot hollow cathode faying surface coating technique. The three types of welds formed were aged at temperatures ranging from 423 to 513 K* (302 to 464/sup 0/F), and their tensile strengths were determined as functions of time and temperature of aging. Little or no change in weld strength was observed with specimens aged at 423 K (302/sup 0/F). In contrast, specimens aged at 473 and 513 K (392 and 464/sup 0/F) experienced a significant decrease in their tensile strength and by as much as 60% for the 1100 alloy: Changes in the mechanical properties of the welds were correlated with the formation and growth of intermetallic phases between silver and aluminum. Microscopic and electron microprobe analyses of aged welds showed the formation of Ag/sub 2/Al with smaller amounts of Ag/sub 3/Al. Variations in the weld strength of the three joint types investigated are discussed in light of differences in the morphologies of the silver-aluminum interfaces and the existence of voids at the weld interface.

Authors:
;
Publication Date:
Research Org.:
General Electric Co., Fremont, CA
OSTI Identifier:
5090536
Resource Type:
Journal Article
Journal Name:
Weld. J. (Miami); (United States)
Additional Journal Information:
Journal Volume: 64:4
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; DIFFUSION WELDING; ALUMINIUM ALLOYS; STAINLESS STEEL-316; AGING; HIGH TEMPERATURE; MATERIALS TESTING; METALLURGICAL EFFECTS; PHYSICAL METALLURGY; SILVER ALLOYS; SURFACE COATING; TENSILE PROPERTIES; VOIDS; WELDED JOINTS; ALLOYS; CHROMIUM ALLOYS; CHROMIUM STEELS; CHROMIUM-NICKEL STEELS; CORROSION RESISTANT ALLOYS; DEPOSITION; ELEMENTS; FABRICATION; HEAT RESISTANT MATERIALS; HEAT RESISTING ALLOYS; IRON ALLOYS; IRON BASE ALLOYS; JOINING; JOINTS; MATERIALS; MECHANICAL PROPERTIES; METALLURGY; METALS; MOLYBDENUM ALLOYS; NICKEL ALLOYS; STAINLESS STEELS; STEELS; TESTING; WELDING; 360101* - Metals & Alloys- Preparation & Fabrication

Citation Formats

Walmsley, D R, and Munir, Z A. An investigation of diffusion welding of pure and alloyed aluminum to type 316 stainless steel. United States: N. p., 1985. Web.
Walmsley, D R, & Munir, Z A. An investigation of diffusion welding of pure and alloyed aluminum to type 316 stainless steel. United States.
Walmsley, D R, and Munir, Z A. 1985. "An investigation of diffusion welding of pure and alloyed aluminum to type 316 stainless steel". United States.
@article{osti_5090536,
title = {An investigation of diffusion welding of pure and alloyed aluminum to type 316 stainless steel},
author = {Walmsley, D R and Munir, Z A},
abstractNote = {Using silver as an intermediate layer, samples of Type 316 stainless steel specimens were diffusion welded to two aluminum alloys (1100 and 6061) and to 99.999% pure aluminum, utilizing the hot hollow cathode faying surface coating technique. The three types of welds formed were aged at temperatures ranging from 423 to 513 K* (302 to 464/sup 0/F), and their tensile strengths were determined as functions of time and temperature of aging. Little or no change in weld strength was observed with specimens aged at 423 K (302/sup 0/F). In contrast, specimens aged at 473 and 513 K (392 and 464/sup 0/F) experienced a significant decrease in their tensile strength and by as much as 60% for the 1100 alloy: Changes in the mechanical properties of the welds were correlated with the formation and growth of intermetallic phases between silver and aluminum. Microscopic and electron microprobe analyses of aged welds showed the formation of Ag/sub 2/Al with smaller amounts of Ag/sub 3/Al. Variations in the weld strength of the three joint types investigated are discussed in light of differences in the morphologies of the silver-aluminum interfaces and the existence of voids at the weld interface.},
doi = {},
url = {https://www.osti.gov/biblio/5090536}, journal = {Weld. J. (Miami); (United States)},
number = ,
volume = 64:4,
place = {United States},
year = {Mon Apr 01 00:00:00 EST 1985},
month = {Mon Apr 01 00:00:00 EST 1985}
}