Pre-alloyed powder of Ti-22Al-24Nb-0.5Mo（atomic fraction,%） was prepared by gas atomization.Powder metallurgy（PM） Ti 2AlNb alloys were prepared by a hot isostatic pressing（HIPing） route.The influence of experime...Pre-alloyed powder of Ti-22Al-24Nb-0.5Mo（atomic fraction,%） was prepared by gas atomization.Powder metallurgy（PM） Ti 2AlNb alloys were prepared by a hot isostatic pressing（HIPing） route.The influence of experimental variables including HIPing temperatures,solution and aging temperatures on microstructure and properties of PM Ti 2AlNb alloys was studied.The results showed that HIPing temperature affected the porosity distribution and mechanical properties of PM Ti 2AlNb alloys.The microstructure and mechanical properties of the PM Ti 2AlNb alloys changed obviously after various post heat treatments,and a good combination of tensile strength,ductility and rupture lifetime was obtained through an optimized heat treatment in the present work.展开更多
文摘Pre-alloyed powder of Ti-22Al-24Nb-0.5Mo（atomic fraction,%） was prepared by gas atomization.Powder metallurgy（PM） Ti 2AlNb alloys were prepared by a hot isostatic pressing（HIPing） route.The influence of experimental variables including HIPing temperatures,solution and aging temperatures on microstructure and properties of PM Ti 2AlNb alloys was studied.The results showed that HIPing temperature affected the porosity distribution and mechanical properties of PM Ti 2AlNb alloys.The microstructure and mechanical properties of the PM Ti 2AlNb alloys changed obviously after various post heat treatments,and a good combination of tensile strength,ductility and rupture lifetime was obtained through an optimized heat treatment in the present work.
基金the Cultivation Project for Original Scientific Research Instruments and Equipments of Southwest Jiaotong University,China(No.XJ2021KJZK041)the Key Laboratory of Infrared Imaging Materials and Detectors,Shanghai Institute of Technical Physics,Chinese Academy of Sciences(No.IIMDKFJJ-19-08)the China Postdoctoral Science Foundation(No.2018T110993)。
