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Title
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The Effect of Addition Elements on the Rate of Beta Grain Growth in Alph-Beta and Beta Titanium Alloys
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Date
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1962
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Index Abstract
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Coming Soon
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Photo Quality
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Complete
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Report Number
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ASD TDR 62-520
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Corporate Author
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Armour Research Foundation
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Laboratory
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Directorate of Materials and Processes
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Extent
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60
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Identifier
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AD0292703
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AD0292703
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Access Rights
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OTS
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Distribution Classification
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1
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Contract
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AF 33(616)-7687
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DoD Project
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7351 - Metallic Materials
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DoD Task
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735105
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DTIC Record Exists
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Yes
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Distribution Change Authority Correspondence
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None
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Report Availability
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Full text available
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Date Issued
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1962-11
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Abstract
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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.
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Corporate Report Number
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ARF 2213-14
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AD Number
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AD-292 703
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Distribution Conflict
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No
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Index In
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U.S. Government Research Reports, Vol. 38, No. 7, p. 89
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Index Price
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$1.50
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Provenance
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Lockheed Martin Missiles & Fire Control
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Type
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report
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Format
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1 online resource
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Creator
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Crossley, F. A.
ASDTDR62-520.pdf