Fusion Welding of Refractory Metals

Conference · Sun Oct 20 00:00:00 EDT 1991

OSTI ID:5241979

Robino, C. V. ^[1]

---

1. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

The refractory metals of Groups 5B and 6B and their alloys display a variety of unique physical and mechanical characteristics in addition to their high melting points. In turn, these characteristics make these materials strong candidates for severe service and specialized applications. However, these materials also present a variety of challenges with respect to both fabrication weldability and the in-service behavior of weldments, many of which are related to the dominant effects of interstitial impurities. This work reviews current understanding of the physical and joining metallurgy of these metals and their alloys with emphasis on fusion welding. Of specific interest are the role of impurities and alloy chemistry in fabrication and service weldability, the material processing route, eg. vacuum melting vs. powder metallurgy, the importance of welding process procedures and variables, weldment mechanical properties, and fracture behavior. Specific examples from the various alloy systems are used to illustrate general metallurgical and joining characteristics of this class of materials.

• Research Organization: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5241979
• Report Number(s): SAND-91-1843C; CONF-911003--12; ON: DE91018397
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
DEFECTS
ELECTRON MICROSCOPY
ELEMENTS
FABRICATION
JOINING
METALS
MICROSCOPY
MOLYBDENUM
NIOBIUM
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
REFRACTORY METALS
TANTALUM
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSMISSION ELECTRON MICROSCOPY
TUNGSTEN
WELDABILITY
WELDING