Maraging steels possess ultrahigh strength combined with ductility and toughness and could be easily fabricated and heat-treated. Bulk metalworking of maraging steels is an important step in the component manufacture. To optimize the hot-working parameters (temperature and strain rate) for the ring rolling process of maraging steel used for the manufacture of rocket casings, a systematic study was conducted to characterize the hot working behavior by developing processing maps for gamma-iron and an indigenous 250 grade maraging steel. The hot deformation behavior of binary alloys of iron with Ni, Co, and Mo, which are major constituents of maraging steel, is also studied. Results from the investigation suggest that all the materials tested exhibit a domain of dynamic recrystallization (DRX). From the instability maps, it was revealed that strain rates above 10 s-1 are not suitable for hot working of these materials. An important result from the stress-strain behavior is that while Co strengthens gamma-iron, Ni and Mo cause flow softening. Temperatures around 1125 degree C and strain rate range between 0.001 and 0.1 s-1 are suitable for the hot working of maraging steel in the DRX domain. Also, higher strain rates may be used in the meta-dynamic recrystallization domain above 1075 degree C for high strain rate applications such as ring rolling. The microstructural mechanisms identified from the processing maps along with grain size analyses and hot ductility measurements could be used to design hot-working schedules for maraging steel.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Optimization of process parameters for the manufacturing of rocket casings: A study using processing maps


    Contributors:


    Publication date :

    2003


    Size :

    14 Seiten, 13 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Winding very large rocket motor casings

    Klein, B. | Engineering Index Backfile | 1962


    Free Vibrations of Rocket Motor Casings under Internal Pressure

    S. K. Radhamohan / Y. V. K. Sadasiva Rao / B. Prasad | AIAA | 1975


    Robotic NDE inspection of advanced solid rocket motor casings

    McNeelege, Glenn / Sarantos, Chris | AIAA | 1994


    Recycling battery casings

    Online Contents | 1993


    Multiple cell integrated casings

    SNYDER KENT / MASIAS ALVARO / ROBERT BRIAN JOSEPH | European Patent Office | 2020

    Free access