"The recrystallization temperature and the mechanical properties of tensile strength, elongation, reduction in area and hardness were determined for 99.97% indium. Metallographic techniques were developed and stress rupture data were obtained.
Single crystals of indium were grown in a horizontal furnace with a traveling temperature zone, and sectioned in a strain-free manner, with an etch-cutter. Because of the low recrystallization temperature of indium, no further work was done on the single crystals.
The effect of recrystallization on electrical resistance, thermoelectric force, hardness, bending strength, crystallographic orientation and microstructure was studied. The range of recrystallization temperature for small amounts of cold work was from -40° to 0° C and for large amounts of cold work was from -11° to -70° C.
The mechanical properties were found to be a follows: hardness, 0.72 Brinell, 1.197 Knoop and 1.266 to 1.402 DPH; tensile strength 388 psi.; elongation, 70%; and reduction in area, 95%. Stress rupture data were obtained, and a master rupture was plotted for indium.
A major improvement was made in the etching procedure which employed aqua regia to show grain orientation and contrast. The use of the etch-cutter to obtain unrecrystallized microstructures was also unique"--Abstract, leaf i.
Eppelsheimer, Daniel S., 1909-1988
Materials Science and Engineering
Ph. D. in Metallurgical Engineering
Missouri School of Mines and Metallurg. Department of Metallurgical Engineering
Missouri School of Mines and Metallurgy
viii, 104 pages
© 1959 Louis John Reitsma, Jr., All rights reserved.
Dissertation - Open Access
Library of Congress Subject Headings
Indium -- Mechanical properties
Indium -- Metallurgy
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Reitsma, Louis John Jr., "A study of the recrystallization and the mechanical properties of indium" (1959). Doctoral Dissertations. 972.