A printing technique to replace the usual marking practice of punching dots or scribing lines on a round tensile specimen is described. With this method the specimen surface will not be influenced by marking, hence premature failure can be avoided in high-speed testing. The printing technique is simple to apply. The printed gauge mark can be controlled to an accuracy of ± 0.002 in for a 1.4 in gauge length. The width of the printed lines is about 0.003 in.
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References
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