Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6748682 | International Journal of Solids and Structures | 2015 | 12 Pages |
Abstract
In this paper a systematic experimental investigation of the room-temperature mechanical response of polycrystalline commercially pure molybdenum (Mo) is presented. It was established that the material has ductility in tension at 10â5/s and that the failure strain is strongly dependent on the orientation. A specimen taken along the rolling direction sustains large axial strains (20%), while a specimen taken at an angle of 45° to the rolling direction could only sustain 5% strain. It was observed that irrespective of the loading orientation the yield stress in uniaxial compression is larger than in uniaxial tension. While in tension the material has a strong anisotropy in Lankford coefficients, in uniaxial compression it displays weak strain-anisotropy. An elastic-plastic orthotropic model that accounts for all the specificities of the plastic deformation of the material was developed. Validation of the model was done through comparison with data on notched specimens. Quantitative agreement with both global and local strain fields was obtained. In particular, the effect of loading orientation on the response was very well described.
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Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Geremy J. Kleiser, Benoit Revil-Baudard, Oana Cazacu, Crystal L. Pasiliao,