| Title |
On the Morphology and Growth of Gamma Prime Precipitates in a Nickel - Base Superalloy |
| Authors |
최형섭(Hyung Sup Choi); 최주(Ju Choi) |
| Abstract |
The kinetics of growth of the gamma prime precipitates in Rene´ 41 have been studied by means of electron microscopy. The coarsening behavior of the gamma prime precipitates was determined as a function of aging time by measuring the particle sizes of samples aged at 760℃, 840℃ and 880℃, respectively. The measured coarsening rates and particle size distributions were in good agreement with the predictions of the Lifshitz-Wagner theory of diffusion controlled coarsening at all aging temperatures examined. The value of the activation energy for the coarsening process was found from the experimental data to be 65.9 ㎉/㏖. Also the merphology of gamma prime precipitates is discussed. |