Determination of J-integral R-curves for Hastelloy X and inconel 617 up to 1223 K using the potential drop technique
✍ Scribed by Dr. K. Krompholz; E. D. Grosser; K. Ewert
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 869 KB
- Volume
- 13
- Category
- Article
- ISSN
- 0933-5137
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
For Hastelloy X (T = 308 K and T = 1223 K) and for Inconel 617 (T = 308 K, 473 K, 673 K, 873 K, 973 K, 998 K, 1023 K, 1048 K, 1073 K, 1173 K, and 1223 K) the J‐integral R‐curves have been determined. For Hastelloy X at 308 K the multispecimen technique has been compared with the single specimen method using the potential drop technique. At 1223 K Hastelloy X delivered a low J~0~‐integral value. Inconel 617 showed a smooth increase in J~0~ with increasing temperature, up to 998 K; above this temperature even for large loadline displacements only blunting behaviour has been observed. The same tendency has been found for the evaluation of the tearing modulus. With increasing temperature the tearing modulus increases. In the temperature range from 998 K to 1223 K the tearing modulus increases by about one order of magnitude. For both alloys the onset of stable crack growth in most cases is earlier than the load maximum is reached in the load versus load‐line displacement curves.