We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Dynamic softening mechanism of 30 % SiCp/2024Al composite during hot deformation process.
- Authors
Wang, A. Q.; Liu, S. Y.; Xie, J. P.; Ma, D. Q.
- Abstract
Abstract: Using Gleeb‐1500D simulator, the isothermal compression tests of 30 % SiCp/2024Al (volume fraction) are conducted at a temperature range of 623 K ‐ 773 K and a strain rate range of 0.01 s‐1 ‐ 10 s‐1. The softening mechanism of composites during hot deformation has been proposed based on the Zener‐Hollomon parameter Z, deformation temperature T and microstructure analysis. Cross slip of dislocation plays a dominant role under the conditions of lnZ≥59.634 and T≤673 K. While, deformation mechanisms such as cross slip, climb of dislocation and unzipping of the three dimensional dislocation network play a joint role when lnZ≤61.933 and T≥623 K. Particularly, dynamic recrystallization occurred when lnZ≤55.669 and T≥723 K. The cross slip, climb and unzipping of dislocation and dynamic recrystallization are the main softening mechanisms. The role of the dynamic recrystallization mechanisms become more significant and the critical strain of dynamic recrystallization decrease with the decrease of lnZ. Dynamic recrystallization nucleation mechanisms are mainly constituted of the subgrain combination and the bulging of the grain boundary.
- Subjects
SILICON compounds; METALLIC composites; METAL formability; AUSTENITIC steel; ALUMINUM oxide
- Publication
Materialwissenschaft und Werkstoffechnik, 2018, Vol 49, Issue 9, p1098
- ISSN
0933-5137
- Publication type
Article
- DOI
10.1002/mawe.201700185