Accession Number : ADA608001


Title :   Dynamic Multiaxial Response of a Hot-Pressed Aluminum Nitride


Descriptive Note : Journal article


Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE


Personal Author(s) : Hu, Guangli ; Chen, C Q ; Ramesh, K T ; McCauley, J W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a608001.pdf


Report Date : 05 Jan 2012


Pagination or Media Count : 10


Abstract : The dynamic multiaxial response of hot-pressed AlN is characterized through quasi-static uniaxial compression, dynamic uniaxial compression and dynamic confined compression experiments within the strain rate range of 10(expn -3) -10(expn 3) s(expn -1). Real-time visualization shows the failure patterns change from axial splitting under uniaxial dynamic compression to shear faulting under confinement. The compressive strength is moderately sensitive to both the confining stress and the loading rate. Post-mortem fracture surface studies show that the dominant fracture mechanism remains transgranular fracture under all loading conditions.


Descriptors :   *ALUMINUM NITRIDES , *DYNAMIC RESPONSE , CERAMIC MATERIALS , COMPRESSION , COMPRESSIVE STRENGTH , DYNAMIC TESTS , FAILURE(MECHANICS) , FAULTS , FRACTURE(MECHANICS) , HOT PRESSING , LOADS(FORCES) , SPLITTING , STRAIN RATE


Subject Categories : Properties of Metals and Alloys
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE