期刊
EXPERIMENTAL MECHANICS
卷 50, 期 6, 页码 737-743出版社
SPRINGER
DOI: 10.1007/s11340-009-9271-4
关键词
Load-depth sensing indentation; Multiple-partial unloading; Micro-indentation; Young's modulus
资金
- DOE/NETL UCR [DE-FG26-05NT42526]
- Office of Fossil Energy
- Advanced Research Materials (ARM)
- U.S. Department of Energy [DE-AC05-00OR22725]
- National Energy Technology Laboratory [DE-C26-04NT41817.606.01.01]
A load-based multiple-partial unloading micro-indentation technique has been developed for evaluating mechanical properties of materials. Comparing to the current prevailing nano/micro-indentation methods, which require precise measurements of the indentation depth and load, the proposed technique only measures indentation load and the overall indentation displacement (i.e. including displacement of the loading apparatus). Coupled with a multiple-partial unloading procedure during the indentation process, this technique results in a load-depth sensing indentation system capable of determining Young's modulus of metallic alloys with flat, tubular, or curved architectures. Test results show consistent and correct elastic modulus values when performing indentation tests on standard alloys such as steel, aluminum, bronze, and single crystal superalloys. The proposed micro-indentation technique has led to the development of a portable load-depth sensing indentation system capable of on-site, in-situ material property measurement.
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