Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1584632 | Materials Science and Engineering: A | 2006 | 4 Pages |
Abstract
Amplitude-dependent internal friction (ADIF) was measured in a polycrystalline niobium using four modes of flexural vibration from the fundamental to the third-order resonance at room temperature. The ADIF was detected in each vibration mode. The internal-friction versus strain-amplitude curve of the ADIF shifted to a larger strain-amplitude range as frequency increased. The stress–strain curves were derived from the ADIF data, and the microplastic flow stress defined as the stress required to produce a plastic strain of 1 × 10−9 was read from the stress–strain curves. It was found that the microplastic flow stress was proportional to the frequency.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Naoki Ide, Tomohiro Atsumi, Yoichi Nishino,