(Committee E-24 on Fracture Testing of )American society for testing and Materials (Committee G-2 on erosion and wear)American society for testing and materials (Committee E-9 on Fatigue)American Society for Testing and Materials C (Committee E-1 o n Methods of Testing)American Society for Testing Materials (Committee)American Society for Testing and Materials (Pittsburgh )American Society for Testing and Materials (Charleston)American Society for Testing and Materials (Dallas)American Society for Testing and Materials American society for testing and materials (Philadeiphia)American Society for Testing ��� Materials