摘要
The combined effects of （Y, Cu） on the microstructttre and room-temperature mechanical properties of the NiA1 intermetallic com- pound under uniaxial compression stress were investigated. It is found that the co-addition of Y and Cu enlarges the difference between the inter- granular yield strength and the intragranular yield strength of NiA1 grains. Hence, for the resultant NiAI-（Y,Cu） alloy, a mechanically hierar- chical structure forms. This is beneficial to improve the room-temperature mechanical response of NiA1 alloys; as a result, the resultant alloy with 0.56at% （Y, Cu） exhibits a remarkably enhanced compression plasticity of about 11.2%.
The combined effects of （Y, Cu） on the microstructttre and room-temperature mechanical properties of the NiA1 intermetallic com- pound under uniaxial compression stress were investigated. It is found that the co-addition of Y and Cu enlarges the difference between the inter- granular yield strength and the intragranular yield strength of NiA1 grains. Hence, for the resultant NiAI-（Y,Cu） alloy, a mechanically hierar- chical structure forms. This is beneficial to improve the room-temperature mechanical response of NiA1 alloys; as a result, the resultant alloy with 0.56at% （Y, Cu） exhibits a remarkably enhanced compression plasticity of about 11.2%.
基金
supported by the Project of Liaoning Province Educational Bureau (No.05L316)
Initiating Project for Doctors of Shenyang Aerospace University (No.05YB31)
