Radhakrishna Bhat, B. V. ; Mahajan, Y. R. ; Roshan, H. Md. ; Prasad, Y. V. R. K. (1994) Characteristics of superplasticity domain in the processing map for hot working of an Al alloy 2014-20vol.%Al2O3 metal matrix composite Materials Science and Engineering A, 189 (1-2). pp. 137-145. ISSN 0921-5093
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/092150...
Related URL: http://dx.doi.org/10.1016/0921-5093(94)90409-X
Abstract
The processing map for hot working of Al alloy 2014-20vol.%Al2O3 particulate-reinforced cast-plus-extruded composite material has been generated covering the temperature range 300–500°C and the strain rate range 0.001–10 s−1 based on the dynamic materials model. The efficiency η of power dissipation given by 2m/(m+1), where m is the strain rate sensitivity, is plotted as a function of temperature and strain rate to obtain a processing map. A domain of superplasticity has been identified, with a peak efficiency of 62% occurring at 500 °C and 0.001 s−1. The characteristics of this domain have been studied with the help of microstructural evaluation and hot-ductility measurements. Microstructural instability is predicted at higher strain rates above (1s−1) and lower temperatures (less than 350°C).
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 37884 |
| Deposited On: | 30 Apr 2011 08:03 |
| Last Modified: | 30 Apr 2011 08:03 |
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