Evaluation of high-temperature tensile behavior for metal foils by a novel resistance heating assisted tensile testing system using samples with optimized structures
نویسندگان
چکیده
To evaluate the tensile behavior of metal foils by resistance heating (RH) assisted testing system accurately, this study proposed to embed a digital image correlation (DIC) with laser speckles for measurement full-field strain distribution. Furthermore, sample structures were optimized achieve uniform temperature and An infrared camera was used monitor Rectangular samples instead dog-bone shaped proposed. A model calculating distribution established optimize structure. The parameters that influence studied. As results, compared measured non-contact extensometer, maximum deviation DIC less than 6% when nominal larger 0.013. It is confirmed reliable measuring distributions. Sample shape influenced distributions smaller while it almost had no on samples. difference not affected material type but size. rectangular validated be feasible RH testing. length successfully more model. Although deformation shape, resulted in non-uniform before achieving ultimate strength. Longer effective between two clamping jigs contributed deformation. accurate evaluation high-temperature can achieved using an
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ژورنال
عنوان ژورنال: Journal of Materials Science & Technology
سال: 2021
ISSN: ['1941-1162', '1005-0302']
DOI: https://doi.org/10.1016/j.jmst.2021.03.061