Orientation dependence of slip and twinning in HCP metals
- Florida International Univ., Miami, FL (United States). Hemispheric Center for Environmental Technology
- Xi`an Jiaotong Univ. (China). Research Inst. for Strength of Metals
In the compression of basal slip metals, brittle fracture (c/a > {radical}3) or {l_brace}10{bar 1}2{r_brace} twinning (c/a < {radical}3) occurs in crystals with orientations situated in the region near the base circle of the unit triangle; {l_brace}10{bar 1}2{r_brace} twinning (c/a > {radical}3) or brittle fracture (c/a < {radical}3) occurs in crystals with orientations close to the 0001 pole of the triangle, and slip may also be detected in these crystals; double basal slip is dominant in crystals with orientations near the 0001--10{bar 1}0 border; and single basal slip is dominant in crystals with orientations situated in the remaining portion of the unit triangle. For prismatic slip metals under tensile loading, ({bar 1}012) and ({bar 1}102), (11{bar 2}1), and ({bar 1}{bar 1}22) are dominant twinning mechanisms in crystals with orientations situated in the region close to the 0001 pole, respectively. Under compressive loading, (11{bar 2}2), ({bar 1}{bar 1}21), and (10{bar 1}2) twinning are dominant in crystals with orientations situated in the region near the 0001 pole, in the central region and in the region near the base circle of the triangle, respectively. When a hcp metal crystal is subjected to a reversed push-pull cyclic loading, the crystal is simultaneously subjected to favorable twinning systems under tensile and compressive loads.
- OSTI ID:
- 509205
- Journal Information:
- Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 12 Vol. 36; ISSN 1359-6462; ISSN SCMAF7
- Country of Publication:
- United States
- Language:
- English
Similar Records
Basal slip and texture development in calcite: new results from torsion experiments
Computer simulation of screw dislocation interactions with twin boundaries in h.c.p. metals