G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 3/42 (2006.01) G01N 3/54 (2006.01) G01N 3/00 (2006.01) G01N 3/02 (2006.01) G01N 33/44 (2006.01)
Patent
CA 2075370
2075370 9112513 PCTABS00006 Disclosed is a method and apparatus of indentation testing of variable types of specimens which includes mounting an indenter member (3) into a thermally expandable member (2), mounting the specimen (5) to be tested on a pedestal (4), loading the specimen with the indenter member by thermally expanding the thermally expandable member and measuring applied force to and displacement of the specimen so as to determine the hardness or other material properties of the specimen. The indenter member is thermally insulated from the thermally expandable member prior to thermally expanding the thermally expandable member. The thermal expansion driven indentation system in the present invention allows for controlled application of precise and continuous reproducible loads to produce stress-strain plots. Continuous indentation testing with this system has yielded results which correlate well to Rockwell fixed load hardness tests on standard test blocks. Further, efforts in drawing relationships with tensile results have shown support for the use of continuous indentation testing for the generation of local material properties.
Armstrong Ronald William
Lesko John J.
Swabey Ogilvy Renault
University Of Maryland (the)
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