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This document assesses the mechanical properties and fracture toughness of two 155mm artillery projectile bodies made of HF-1 steel. Testing found that the M549 projectile body had been heat treated correctly to be fully martensitic, resulting in higher fracture toughness than the M795 body which had an incorrectly heat treated microstructure containing non-martensitic phases. Fracture toughness values determined using different test specimens agreed well for the M549 body but differed significantly for the

Author

Kotsoor

Language

EN