Representation of the displacement rate between the loading points in terms of applied stress and temperature and its relation to creep crack growth rate, C∗, P and Q∗ parameters
✍ Scribed by A.Toshimttsu Yokobori Jr.; H. Tomizawa; H. Sakata; T. Kako; T. Kuriyama
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 788 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0013-7944
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✦ Synopsis
The displacement rate d between the loading points in SUS 304 stainless steel has been experimentally obtained under several applied gross stress and high temperatures, and the equation for 6 has been obtained experimentally as a function of applied gross stress os and absolute temperature 7'. Then, the relation of 6 to creep crack growth rate da/dt was clearly shown in terms of equation. Furthermore, the relation has been chuitied between the energy rate line integral C* as affected by 6, and P parameter. In this way, it is clearly shown why log (da/dr) data plotted against log C* deviates in some systematic trend with the increase of temperature and gross stress, respectively, whereas log da/dt vs the P parameter becomes exactly the same and one straight line independent of temperature and gross stress. The discussion is made on that the similar relation will hold between the evaluation by C* and that by Q or by Q*.