Study on the Mechanical Performance of a Ni-Based Superalloy with Trace Rare Earth Element La Additions

摘要：

　　The microstructures and mechanical properties of the Ni-22Cr-14W-2Mo superalloys with various La contents have been investigated.The results indicate that the grain diameters of the alloys with different La additions are similar to that of the alloy without La.It has also been found that the Vickers Hardness of the alloys increases with the increasing of the La content from 0.000% to 0.087%.The tensile properties of the alloys can be improved by La additions,whereas the σ0.2 proof strength and the elongations of the alloys first increase and then decrease with increasing the La content from 0.000% to 0.087%.The alloy with 0.026% La shows the best tensile properties.This result ascribes to the different types of the La-riched phases and the different sizes of them.The La-Ni intermetallic phases with large size precipitating in the alloys have deleterious effects on the improvement of the mechanical properties,if the La content is too high.

关键词： Ni-based superalloy mechanical properties rare earth La La-riched phases

作者: Xiu Song Lei Wang Yang Liu Huiping Ma

作者单位: Key Lab for Anisotropy and Texture of Materials,Northeastern University,Shenyang 110819,China Department of High-temperature Materials,Central Iron & Steel Research Institute,Beijing 100000,Chin

会议类型: 国际会议

会议名称: The 6th Cross-Strait Conference on Advanced Engineering Materials (第六届海峡两岸工程材料研讨会)

会议地点: 南京

会议语种:英文

页码: 177-181

在线出版日期: 2011-11-08（万方平台首次上网日期，不代表论文的发表时间）