Zafir Alam, Md. ; Chatterjee, D. ; Muraleedharan, K. ; Nandy, T. K. ; Kamat, S. V. ; Jayaram, V. ; Das, D. K. (2011) Effect of strain rate on ductile-to-brittle transition temperature of a free-standing Pt-aluminide bond coat Metallurgical and Materials Transactions A, 42 (6). pp. 1431-1434. ISSN 1073-5623
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Official URL: http://www.springerlink.com/content/u7204242357868...
Related URL: http://dx.doi.org/10.1007/s11661-011-0683-2
Abstract
The ductile-to-brittle transition temperature (DBTT) of a free-standing Pt-aluminide (PtAl) bondcoat was determined using the microtensile testing method and the effect of strain rate variation, in the range 10−5 to 10−1 s−1, on the DBTT studied. The DBTT increased appreciably with the increase in strain rate. The activation energy determined for brittle-to-ductile transition, suggested that such transition is most likely associated with vacancy diffusion. Climb of <100> dislocations observed in analysis of dislocation structure using a transmission electron microscope (TEM) supported the preceding mechanism.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The Minerals, Metals & Materials Society. |
| ID Code: | 63042 |
| Deposited On: | 24 Sep 2011 15:01 |
| Last Modified: | 24 Sep 2011 15:01 |
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