STP559

    Fracture Toughness Test Methods for Abrasion-Resistant White Cast Irons Using Compact Specimens

    Published: Jan 1974


      Format Pages Price  
    PDF (340K) 12 $25   ADD TO CART
    Complete Source PDF (6.3M) 12 $92   ADD TO CART


    Abstract

    The fracture toughness of abrasion-resistant white cast irons has been measured, using precracked compact specimens. Some procedures used for precracking the brittle cast irons were outside the ASTM Test for Plane-Strain Fracture Toughness of Metallic Materials (E 399-72) requirements but still gave valid results. The excellent reproducibility, combined with a range in toughness values of 17.5 to 28.5 ksi√in. (19.2 to 31.4 MN/m3/2) for abrasion-resistant white cast irons, provided the sensitivity necessary to distinguish differences in the toughness of white cast irons resulting from variations in composition or microstructure. The fracture toughness of three commonly used irons, 27Cr, 9Cr-6Ni, and 20Cr-2Mo-1Cu, was compared in the as-cast (and stress-relieved) condition. Heat treating the 20Cr-2Mo-1Cu iron substantially increased the hardness and reduced the fracture toughness slightly.

    Keywords:

    abrasion-resistant iron, white cast iron, fracture properties, toughness, evaluation, mechanical tests, fatigue (materials), mechanical properties


    Author Information:

    Diesburg, DE
    Senior research associate, Ann Arbor Research Laboratory of Climax Molybdenum Company of Michigan, a subsidiary of American Metal Climax, Inc.,


    Paper ID: STP38588S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP38588S


    CrossRef ASTM International is a member of CrossRef.