Fracture resistance in carburizing steels. Part II: impact fracture

Journal Article · Fri Jun 01 04:00:00 EDT 1979 · Met. Prog.; (United States)

OSTI ID:5559097

Diesburg, D E; Smith, Y E

This relatively inexpensive and effective test of fracture resistance was used to compare a broad range of carburized and hardened steels. Heat treating practice was held relatively constant to evaluate the influence of composition. Major findings of the test program are listed below: (1) Higher hardenability steels developed greater fraction resistance than lower hardenability steels. (2) The effects of molybdenum and chromium on fracture resistance were both highly influenced by nickel content. (3) Molybdenum additions were beneficial to the fracture resistance of 1.8% Ni steels, but had little effect on a 0.5% Ni steel. (4) Increasing chromium content tended to reduce fracture resistance at 1% Ni or less, and had no effect at 1.8% Ni. At 3% Ni (SAE 9310), the presence of 1.2% Cr resulted in high fracture resistance. (5) Low core carbon content did not result in high case fracture resistance unless it was accompanied by high alloy content. (6) Variation of surface carbon contents in Mn-Cr and Cr-Mo steels showed that the Cr-Mo steel exhibited a higher average fracture resistance over the 0.7 to 0.9% C range evaluated.

• Research Organization: Climax Molybdenum Co. of Michigan, Ann Arbor
• OSTI ID: 5559097
• Journal Information: Met. Prog.; (United States), Journal Name: Met. Prog.; (United States); ISSN MEPOA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBURIZATION
FAILURES
FRACTURE MECHANICS
FRACTURE PROPERTIES
FRACTURES
HARDENING
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
MECHANICS
STEELS
SURFACE HARDENING
SURFACE TREATMENTS
TESTING