SYMPOSIA PAPER Published: 01 January 1993

Evaluation of Tensile Properties Using a TEM Disk-Size Specimen


Attempting to miniaturize mechanical specimens is certainly not new. In fusion reactor material development, limited space in the test reactor and the dose to personnel in the post-irradiation state dictates that the specimen size be reduced without reducing the accuracy of the test. A four-point bend test on TEM disk specimens (0.3 mm in thickness and 3 mm in diameter) was carried out to evaluate tension test parameters. The bending load-deflection records obtained from the miniature specimen were interpreted with a large-scale deflection bending analysis. The tensile yield strength and the ultimate tensile strength of both a 316L-type stainless steel and a 7075 T6 aluminum (Al) alloy obtained from the miniature four-point bend test agreed well with standard tension test results. A gripping system for tension testing of the TEM-size specimens was also developed. The ultimate tensile strength results of two stainless steels agreed well with those obtained from standard-size specimens; however, the tensile yield strength could not be determined.

Author Information

Nunomura, S
Precision and Intelligence Laboratory, Tokyo Institute of Technology, Yokohama, Japan
Nishijima, T
Tokyo Institute of Technology, Yokohama, Japan
Higo, Y
Precision and Intelligence Laboratory, Tokyo Institute of Technology, Yokohama, Japan
Hishinuma, A
Japan Atomic Energy Research Institute, Ibaraki-ken, Japan
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Developed by Committee: E10
Pages: 256–266
DOI: 10.1520/STP12734S
ISBN-EB: 978-0-8031-5250-2
ISBN-13: 978-0-8031-1869-0