|
|
|
| THE EFFECT OF σ-PHASE IN CERTAIN Ni-Cr-Co BASE SUPERALLOY |
| Chen Gan-sheng Yao Chang-chun Zhong Zeng-yong(Beijing Institute of Iron and Steel Research) |
|
Cite this article:
Chen Gan-sheng Yao Chang-chun Zhong Zeng-yong(Beijing Institute of Iron and Steel Research). THE EFFECT OF σ-PHASE IN CERTAIN Ni-Cr-Co BASE SUPERALLOY. Acta Metall Sin, 1978, 14(3): 284-337.
|
|
|
Abstract An investigation has been carried out on the effect of σ-phase on the mechanical properties of a Ni-Cr-Co based superalloy. Specimens treated to different amount of σ-phase were compared with the same alloy without such phase. It was found that specimens containing σ-phase up to 0.7% (by volume)showed little deterioration in properties, whereas in the case of those with σ-phase amounted to 2—4%, the room temperature tensile strength, impact toughness, endurance, creep and fracture toughness of the alloy were very markedly lowered. Moreover, cracks along the interfaces between the σ-phase grains and the matrix were often observed. Tensile properties at high temperatures, however, seems to be little affected by such phase. It would appear that σ-phase, being hard and brittle at room temperature, becomes deformable at elevated temperatures.
|
|
Received: 18 March 1978
|
[1] Dreshfield, R. L. and Ashbrook, R. L., NASA TND-6015, (1969) .
[2] Dreshfield, R. L. and Ashbrook, R. L., NASA TN D-7654, (1974) .
[3] Sims, C. T., The Superalloys, ed. by C. T. Sims and W. C. Hagel, Wiley, New York, (1972) , 259．
[4] Mihslidin, J. R. et al., Trans. AIME, 242 (1968) , 2399．
[5] Chaudhuri, A., J. Inst. Metals, 100 (1972) , 335．
[6] Woodyatt, L. R. et al., Trans. AIME, 236 (1966) , 519．N |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
