Microstructural control of thin-film diffusion-brazed titanium
This study was designed to determine what parameters should be controlled to achieve quality joints of good toughness and high strength in titanium alloys. Emphasis was placed upon studying those parameters which provided tough joints compatible with the titanium base metal being joined. This paper is concerned with thin-film diffusion brazing based upon the eutectic system formed between copper and titanium. In order to control the joint microstructure, the copper diffusion rates and the beta-phase decomposition kinetics were studied. This information was used to produce various types of microstructures in test specimens. These were then evaluated to select the best microstructures for toughness and strength which were compatible with the titanium alloys. Results show that it is possible to accurately control properties of joints produced by thin-film diffusion brazing. This is done by controlling the initial copper content and the time-temperature parameters used in processing. Alloys studied were Ti--8Al--1Mo--1V and Ti--6Al--4V. (auth)
- Research Organization:
- Aircraft Div. of Northrop Corp., Hawthorne, CA
- NSA Number:
- NSA-33-017707
- OSTI ID:
- 4118089
- Journal Information:
- Weld. J. (Miami), v. 55, no. 1, pp. 26-27, Journal Name: Weld. J. (Miami), v. 55, no. 1, pp. 26-27; ISSN WEJUA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
*MOLYBDENUM ALLOYS-- MICROSTRUCTURE
*TITANIUM BASE ALLOYS-- MICROSTRUCTURE
*VANADIUM ALLOYS-- MICROSTRUCTURE
360101* --Materials--Metals & Alloys--Preparation & Fabrication
BRAZED JOINTS
COPPER
DIFFUSION
N50220* --Metals
Ceramics
& Other Materials--Metals & Alloys--Preparation & Fabrication
PHASE DIAGRAMS