摘要
运用高温合金强化机理,在FGH97合金标准成分的基础上,调整Co、Cr、Mo、W 4种合金化元素的含量,设计制备了3种合金,以研究合金元素对合金的强化作用。结果表明:调整合金元素含量后,FGH97合金中γ晶格常数获得提高,起到了固溶强化的效果,同时γ/γ′相错配度绝对值的提高增强了共格应变强化的效果;调整合金元素含量对显微组织、γ′相和碳化物等相的析出没有明显影响,没有增强晶界强化和沉淀强化的效果;固溶强化对强度增量的贡献值最高。
Based on typical FGH97 components,three P/M superalloys were designed and prepared by modifying alloying elements contents of Co,Cr,Mo and W.The strengthening effect of alloying elements on FGH97 was investigated.The results show that after modifying four alloying elements contents,the lattice parameters of γ phases increase which enhances the effect of solid solution strengthening,and absolute values of γ/γ′ misfit increase which enhances coherent strain strengthening.However,there is no precipitation strengthening or grain boundary strengthening.Solid solution strengthening makes the largest contribution to the increment of tensile strength at room temperature.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第6期1578-1583,共6页
Rare Metal Materials and Engineering
基金
国家国际科技合作专项(2014DFR50330)
关键词
FGH97
合金化
抗拉强度
固溶强化
共格应变强化
FGH97
alloying
tensile strength
solid solution strengthening
coherent strain strengthening
