The Effect of Addition Elements on the Rate of Beta Grain Growth in Alph-Beta and Beta Titanium Alloys

Item

Title
The Effect of Addition Elements on the Rate of Beta Grain Growth in Alph-Beta and Beta Titanium Alloys
Date
1962
Index Abstract
Coming Soon
Photo Quality
Complete
Report Number
ASD TDR 62-520
Corporate Author
Armour Research Foundation
Laboratory
Directorate of Materials and Processes
Extent
60
Identifier
AD0292703
AD0292703
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(616)-7687
DoD Project
7351 - Metallic Materials
DoD Task
735105
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
None
Report Availability
Full text available
Date Issued
1962-11
Abstract
The inhibition of beta grain growth in titanium alloys was investigated. The principal means investigated was the addition of minor amounts of solutes. Grain growth inhibition was expected to result from the preferential adsorption of additions on the gain boundary and the consequent lowering of the grain boundary energy. Solutes were selected on two bases: (1) experimental indication of the effectiveness as reported in the literature, and (2) anticipated high degree of polarizability. Solutes of high polarizability were expected to be relatively more effective in lowering the grain boundary energy because of the ease by which their outer electronic field can be distorted. The study involved three base compositions: unalloyed titanium, B-120VCA (Ti-13V-11Cr-3Al), and Ti-8Al-1Mo-1V alloy. Additions were selected for high polarizability were barium and strontium. Other additions evaluated were boron, sulfur, and silver plus hafnium. The sulfur and boron additions produced particulate phases in the alloys. Only additions of sulfur or boron inhibited beta grain growth in titanium and Ti-8Al-1Mo-1V alloy. However, in B-120VCA barium was only slightly less effective in inhibiting grain growth than sulfur or boron. Room temperature tensile properties gave no indications of detriment to mechanical properties due to any of the additions. Strontium appeared to be beneficial to ductility through a scavenging action.
Corporate Report Number
ARF 2213-14
AD Number
AD-292 703
Distribution Conflict
No
Index In
U.S. Government Research Reports, Vol. 38, No. 7, p. 89
Index Price
$1.50
Provenance
Lockheed Martin Missiles & Fire Control
Type
report
Format
1 online resource
Creator
Crossley, F. A.
Item sets
Illinois Tech Related
Media
ASDTDR62-520.pdf

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