INVESTIGATION OF HEAT TREATMENT AND WELDING CHARACTERISTICS OF B-120 VCA TITANIUM ALLOY SHEET. PART II
Abstract
DESCRIPTORS: *Titanium alloys, Heat treat ment, Welding, Vanadium alloys, Chromium alloys, Aluminum alloys, Tensile properties, Aging, Welds, Sheets, Elasticity, Electron microscopy, Measurement, Microstructure, Mechanical properties. Studies on heat treatment and welding technique were continued in an effort to improve the tensile properties of B-120 VCA in the aged condition. Special welding techniques were not effective in enhancing the aged weld metal tensile properties. Cold rolling after welding provided improved tensile properties in the asrolled and the rolled and aged conditions, depending on the desired strength. Aging treatments at 800 F provided improved properties, either as the complete isothermal age or as the first stage in a duplex (800 to 1000 F) age. Useful weld metal tensile properties were obtained over a wide strength range, but the weld metal properties are still considerably deficient to those of the base metal. The physical metallurgy of the aging and duplex aging reactions was substantiated indirectly by electron microscopy and elastic modulus measurements. Aging is apparently due to precipitation of omega and alpha phases, and omega disappears in the early stages of post-age annealing (1000 F). (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 30, 1962
- Accession Number
- AD0290730
Entities
People
- John F. Rudy
Organizations
- IIT Research Institute