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ASTM Selected Technical Papers
The Use of Small-Scale Specimens for Testing Irradiated Material
By
WR Corwin
WR Corwin
1
Metallurgical Engineer
, Metals and Ceramics Division,
Oak Ridge National Laboratory
,
Oak Ridge, Tennessee
;
symposium chairman and editor
Search for other works by this author on:
GE Lucas
GE Lucas
2
Associate Professor
, Department of Chemical and Nuclear Engineering,
University of California
,
Santa Barbara, California
;
symposium chairman and editor
Search for other works by this author on:
ISBN-10:
0-8031-0440-5
ISBN:
978-0-8031-0440-2
No. of Pages:
390
Publisher:
ASTM International
Publication date:
1986

In response to the requirements of the fusion reactor materials development program for small-scale mechanical property tests, two techniques have been developed, namely ball microhardness and shear punch tests. The ball microhardness test is based on the repeated measurement at increasing loads of the chordal diameter of an impression made by a spherical penetrator. A correlation has been developed to predict the constitutive relation of the test material from these data. In addition, the indentation pile-up geometry can be analyzed to provide information on the homogeneity of plastic flow in the test material. The shear punch test complements the microhardness test. It is based on blanking a circular disk from a fixed sheet metal specimen. The test is instrumented to provide punch load-displacement data, and these data can be used to determine flow properties of the test material such as yield stress, ultimate tensile strength, work-hardening exponent, and reduction of area.

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