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A Torsion Creep Tester for Metals and Alloys Using Electromechanical and Servomechanical Instrumentation.

Authors
Schwaneke-AE; Miller-VR; Nash-RW
Source
NTIS: PB 196 610 :13 pages
Link
NIOSHTIC No.
10009207
Abstract
A versatile torsion creep tester was instrumented with electromechanical and servomechanical components to operate automatically and unattended, producing digital printed outputs. The apparatus uses an electrical system for applying torsional stresses, and a unique angular transducer as a null detector operating a servocontrolled strain measuring system with the digital readout. The tester is designed to measure the creep in single- crystal or polycrystalline zinc, zinc alloys, magnesium, magnesium alloys, or other metals and alloys. Applied stresses may be varied from zero up to 2,000 psi in the outermost fibers of a 1/2-inch- diameter, 4-inch-long specimen. Strain readings to 0.001 Degree, equivalent to a strain of 2.73 X 10-7, may be made automatically from one every 5 seconds to one per month. The apparatus has provisions for programmed temperature control and special atmospheres or vacuum operation. A discussion of applications of the system to other mechanical testing apparatus is included.
Publication Date
19700101
Document Type
IH; Report of Investigations
Fiscal Year
1970
NTIS Accession No.
PB-196610
NTIS Price
A03
Identifying No.
RI 7456
NIOSH Division
RORC;
Source Name
NTIS: PB 196 610
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