Fracture toughness and fatigue crack propagation in high strength steel from room temperature to −180°c
✍ Scribed by Tadashi Kawasaki; Seiji Nakanishi; Yozo Sawaki; Kenichi Hatanaka; Takeo Yokobori
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 587 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0013-7944
No coin nor oath required. For personal study only.
✦ Synopsis
Abbxt-Fracture toughness under tensile test and fatigue test on high strength steel at teqrature ranging from room temperature to -180°C were experimentilly studied. The value of fracture toughness under fatigue test is considerably lower than that obtained under tensile test. Within the range from room temperature to -1ooDc the following results were obtained: the power coefllcient 6 of the fatigue crack prop@on rate {[(dc)/(dN)]= AAK'} is related with [(l)/(T)] as: 8 = b, + [(u,)/(kT)]. [(dc)/(dN)] shows Arrhenius type, and, however, d&rent equation from usual stress dependent rate process equation. The trend is in guod agreement with the dislocation dynamics theory of fatigue crack propagation.