scholarly journals New Process for Grain Refinement of Aluminum. Final Report

2000 ◽  
Author(s):  
Dr. Joseph A. Megy
Keyword(s):  
Grain Refinement ◽  
Final Report ◽  
New Process

scholarly journals Grain refinement of permanent mold cast copper base alloys. Final report

2004 ◽  
Author(s):  
M. Sadayappan ◽  
J. P. Thomson ◽  
M. Elboujdaini ◽  
G. Ping Gu ◽  
M. Sahoo
Keyword(s):  
Grain Refinement ◽  
Final Report ◽  
Permanent Mold ◽  
Copper Base ◽  
Permanent Mold Cast

Grain Refinement in Titanium-Erbium Alloys

1974 ◽  
Vol 32 ◽  
pp. 522-523
Author(s):  
B. B. Rath ◽  
J. E. O'Neal ◽  
R. J. Lederich
Keyword(s):  
Electron Microscopy ◽  
Size Distribution ◽  
Grain Refinement ◽  
Grain Growth ◽  
Volume Fraction ◽  
Pure Titanium ◽  
Systematic Investigation ◽  
Second Phase ◽  
Titanium Matrix ◽  
Average Size

Addition of small amounts of erbium has a profound effect on recrystallization and grain growth in titanium. Erbium, because of its negligible solubility in titanium, precipitates in the titanium matrix as a finely dispersed second phase. The presence of this phase, depending on its average size, distribution, and volume fraction in titanium, strongly inhibits the migration of grain boundaries during recrystallization and grain growth, and thus produces ultimate grains of sub-micrometer dimensions. A systematic investigation has been conducted to study the isothermal grain growth in electrolytically pure titanium and titanium-erbium alloys (Er concentration ranging from 0-0.3 at.%) over the temperature range of 450 to 850°C by electron microscopy.

Nursing and Environmental Health Roundtable: August 26-27, 2002, Research Triangle Park, North Carolina: Final Report

2002 ◽  
Author(s):  
Teresa Nastoff ◽  
◽  
Diane M. Drew ◽  
Pamela S. Wigington ◽  
Julie Wakefield ◽  
...  
Keyword(s):  
North Carolina ◽  
Environmental Health ◽  
Final Report ◽  
Research Triangle
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