Abstract
Hot workability of powder metallurgy molybdenum in the temperature range of 900-1450°C and strain rate range of 0.01-10 s-1 was investigated by hot compression tests on a Gleeble-1500 thermal mechanical simulator. According to experimental results, the dynamic recrystallization (DRX) behavior of powder metallurgy molybdenum was studied and its θ-sigma; and ∂θ/∂sigma;-sigma; curves were established. Based on working hardening rate-stress (θ-sigma;) and working hardening rate-strain (θ-ε) curves, the critical strain (c of DRX was determined. The average grain size (D) and Zener-Hollmon parameter (Z) during DRX process obey the following equation: lnD=3.65597-0.05409lnZ; these researches provide fundamental data for cogging and hot working technology of powder metallurgy molybdenum.
| Original language | English |
|---|---|
| Pages (from-to) | 669-672 |
| Number of pages | 4 |
| Journal | Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering |
| Volume | 40 |
| Issue number | 4 |
| State | Published - Apr 2011 |
Keywords
- Critical strain
- Dynamic recrystallization
- Grain size
- Molybdenum