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

Journal Article · Mon Apr 01 00:00:00 EST 1985 · Weld. J. (Miami); (United States)

OSTI ID:5090536

Walmsley, D R; Munir, Z A

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.

• Research Organization: General Electric Co., Fremont, CA
• OSTI ID: 5090536
• Journal Information: Weld. J. (Miami); (United States), Vol. 64:4
• Country of Publication: United States
• Language: English

Related Subjects

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