To investigate recrystallization behaviors of the alloy IC10,tensile experiments are conducted over a wide range of strain rates（10-4—10-2 s-1）at 900°C by using a material testing system（MTS809）.Experimental...To investigate recrystallization behaviors of the alloy IC10,tensile experiments are conducted over a wide range of strain rates（10-4—10-2 s-1）at 900°C by using a material testing system（MTS809）.Experimental results show that：（1）The flow stress is sensitive to the strain rate while the stress-strain curve at various strain rates exhibit the similar features;（2）The flow stress,the critical stress and the critical strain increase with strain rates.And the mechanisms of these properties are studied based on the examinations of transmission electron microscopy（TEM）and scanning electron microscopy（SEM）.In order to study the flow features of IC10,a new phenomenological constitutive model is developed.The effectiveness of the model is verified by extensive experiments on IC10.展开更多
In order to investigate the yielding behavior of the newly developed Ni 3 Al-based intermetallic alloy IC10, yield stresses have been measured in tension and compression with different orientations. The specimens were...In order to investigate the yielding behavior of the newly developed Ni 3 Al-based intermetallic alloy IC10, yield stresses have been measured in tension and compression with different orientations. The specimens were cut from a sheet with different angles inclined from the solidification direction. The inclined angles were taken to be 0 , 22.5 , 45 , 67.5 and 90 . All experiments were conducted at room temperature except for orientation 0 , whose deformation temperatures ranged from 298 to 1273 K. Experimental results show that the yield strength of alloy IC10 has the anomalous behavior which has been observed for other Ll 2 -long-range ordered intermetallic alloys, but it is less pronounced. The abnormalities show the following characteristics： （i） the yield strength increases as the temperature is raised below the peak temperature, （ii） yield strength anisotropy, （iii） tension/compression asymmetry. Compared to Ni 3 Al single crystals, the polycrystalline exhibits some different yielding behaviors which may be due to the high volume fraction of c phase.展开更多
基金Supported by the Aviation Science Foundation of China(08B52002)~~
文摘To investigate recrystallization behaviors of the alloy IC10,tensile experiments are conducted over a wide range of strain rates（10-4—10-2 s-1）at 900°C by using a material testing system（MTS809）.Experimental results show that：（1）The flow stress is sensitive to the strain rate while the stress-strain curve at various strain rates exhibit the similar features;（2）The flow stress,the critical stress and the critical strain increase with strain rates.And the mechanisms of these properties are studied based on the examinations of transmission electron microscopy（TEM）and scanning electron microscopy（SEM）.In order to study the flow features of IC10,a new phenomenological constitutive model is developed.The effectiveness of the model is verified by extensive experiments on IC10.
文摘In order to investigate the yielding behavior of the newly developed Ni 3 Al-based intermetallic alloy IC10, yield stresses have been measured in tension and compression with different orientations. The specimens were cut from a sheet with different angles inclined from the solidification direction. The inclined angles were taken to be 0 , 22.5 , 45 , 67.5 and 90 . All experiments were conducted at room temperature except for orientation 0 , whose deformation temperatures ranged from 298 to 1273 K. Experimental results show that the yield strength of alloy IC10 has the anomalous behavior which has been observed for other Ll 2 -long-range ordered intermetallic alloys, but it is less pronounced. The abnormalities show the following characteristics： （i） the yield strength increases as the temperature is raised below the peak temperature, （ii） yield strength anisotropy, （iii） tension/compression asymmetry. Compared to Ni 3 Al single crystals, the polycrystalline exhibits some different yielding behaviors which may be due to the high volume fraction of c phase.
