Elastic-Plastic Fracture Toughness (J sub Ic) of High-Strength Steels and Titanium Alloys.

摘要

The elastic-plastic fracture toughness parameter J sub IC has been determined for HY 80, HY 130, 10 Ni steel, 17-4PH steel, and titanium alloys Ti-6Al-2Cb-1Ta-0.8Mo, Ti-7Al-2Cb-1Ta, and Ti-6Al-4V. Tests were carried out at room temperature by use of a multiple-specimen test method and a newly developed single-specimen computer interactive test procedure. J sub I is shown to be an effective parameter in describing fracture toughness on the basis of both crack initiation and crack-growth resistance. The computer interactive test procedure is shown to produce equivalent results when compared with the multiple-specimen test method and possesses distinct advantages over that method. (Author)