FRACTURE CHARACTERISTICS OF STRUCTURAL METALS
Final summary technical rept., 1 July 1962 1 July 1963
THOMPSON RAMO WOOLDRIDGE INC CLEVELAND OH TAPCO DIV
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An experimental program was conducted to deter mine the plane strain fracture toughness K sub IC of the following high-strength materials 4340 steel H-11 steel Maraging steel and Beta titanium. The K sub IC parameter was determined from circumferentially precracked round specimens and by resistance measurements conducted on precracked sheet specimens. Several heats of each material were evaluated over temperatures ranging from -100 to 300 F. Although specific problems occurred in the maraging steel evaluations, the over- all results indicated that reasonably good consistency existed between heats of sheet material. The experimentally determined data were combined with results of plane strain fracture toughness presented in the literature to produce typical room temperature K sub IC values for 4340 and H-11 sheet which could be considered for inclusion in MIL Handbook 5.
- Metallurgy and Metallography