The ballistic performance of a work hardened nitrogen alloyed austenitic steel (P900) was studied by a light gas gun at a projectile velocity of 2500 m/s. To compare ballistic efficiency and residual microstructure to classical martensitic armor steels, tests with a high hardness armor steel were performed. The hardness of the work hardened P900 and the armor steel were 380 HV30 and 500 HV30, respectively. Both steels proved to offer an identical ballistic performance. Measurements of hardness around the crater have shown a strong increase of hardness for P900 whereas the hardness of the armor steel did not change. Compression tests on a split-Hopkinson-pressure-bar show that nitrogen alloyed austenitic steel strain harden very strongly and possess very high strain rate sensitivity. Strain hardening and strain rate sensitivity of high hardness armor steels are very small. Grain sizes in the heat-affected zone near the crater of nitrogen alloyed steels give information about temperature and heating time.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Comparison of nitrogen alloyed austenitic steels and high strength armor steels impacted at high velocity


    Contributors:
    Lach, E. (author) / Koerber, G. (author) / Scharf, M. (author) / Bohmann, A. (author)


    Publication date :

    1999


    Size :

    9 Seiten, 10 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    High strength, nitrogen-alloyed austenitic stainless steel for automotive applications

    Kim, Y.H. / Kim, K.Y. / Lee, W.S. et al. | Tema Archive | 2002



    High nitrogen alloyed steels with enhanced mechanical and chemical properties

    Stein,G. / Menzel,J. / Vereinigte Schmiedewerke,DE | Automotive engineering | 1991


    Metastable Austenitic Steels with Ultra-High Strength and Toughness

    Gerberich, W. W. | SAE Technical Papers | 1969