用金相显微镜,X 射线衍射(XRD),扫描电镜(SEM),透射电镜(TEM)和 X 射线能谱(EDS)对等离子弧堆焊Co-Cr-W 系多元合金层进行了研究,结果表明,合金层基体为具有(200)晶面择优取向的 Co 基固溶体,Co 基固溶体中存在许多堆垛层错;与固溶体组...用金相显微镜,X 射线衍射(XRD),扫描电镜(SEM),透射电镜(TEM)和 X 射线能谱(EDS)对等离子弧堆焊Co-Cr-W 系多元合金层进行了研究,结果表明,合金层基体为具有(200)晶面择优取向的 Co 基固溶体,Co 基固溶体中存在许多堆垛层错;与固溶体组成共晶体的碳化物主要为具有六方点阵并含有层片状孪晶的(Cr, Fe)7C3。展开更多
First-principle simulations have been applied to investigate the effect of copper（Cu） or aluminum（Al） content on the ductility of Al3Ti,AlTi,AlCu,and AlTiCu2 alloys.The mechanical stable and elastic properties of ...First-principle simulations have been applied to investigate the effect of copper（Cu） or aluminum（Al） content on the ductility of Al3Ti,AlTi,AlCu,and AlTiCu2 alloys.The mechanical stable and elastic properties of Al-based intermetallic compounds are researched by density functional theory with the generalized gradient approximation（DFT-GGA）.The calculated lattice constants are in conformity with the previous experimental and theoretical data.The deduced elastic constants show that the investigated Al_3Ti,AlTi,AlCu,and AlTiCu2 structures are mechanically stable.Shear modulus,Young＇s modulus,Poisson＇s ratio,and the ratio B/G have also been figured out by using reckoned elastic constants.A further analysis of Young＇s modulus and Poisson＇s ratio reveals that the third added element copper content has significant effects on the Al-Ti-based ICs ductile character.展开更多
文摘用金相显微镜,X 射线衍射(XRD),扫描电镜(SEM),透射电镜(TEM)和 X 射线能谱(EDS)对等离子弧堆焊Co-Cr-W 系多元合金层进行了研究,结果表明,合金层基体为具有(200)晶面择优取向的 Co 基固溶体,Co 基固溶体中存在许多堆垛层错;与固溶体组成共晶体的碳化物主要为具有六方点阵并含有层片状孪晶的(Cr, Fe)7C3。
基金Project supported by the National Natural Science Foundation of China(Grant Nos.41674088,11574254,11272296,and 11547311)the National Basic Research Program of China(Grant No.2011CB808201)+1 种基金the Fundamental Research Fund for the Central Universities,China(Grant Nos.2682014ZT30 and 2682014ZT31)the Fund of the State Key Laboratory of Solidification Processing in Northwestern Polytechnical University,China(Grant No.SKLSP201511)
文摘First-principle simulations have been applied to investigate the effect of copper（Cu） or aluminum（Al） content on the ductility of Al3Ti,AlTi,AlCu,and AlTiCu2 alloys.The mechanical stable and elastic properties of Al-based intermetallic compounds are researched by density functional theory with the generalized gradient approximation（DFT-GGA）.The calculated lattice constants are in conformity with the previous experimental and theoretical data.The deduced elastic constants show that the investigated Al_3Ti,AlTi,AlCu,and AlTiCu2 structures are mechanically stable.Shear modulus,Young＇s modulus,Poisson＇s ratio,and the ratio B/G have also been figured out by using reckoned elastic constants.A further analysis of Young＇s modulus and Poisson＇s ratio reveals that the third added element copper content has significant effects on the Al-Ti-based ICs ductile character.
