| Autor: |
Demidova, Yu. V., Larionov, V. P. |
| Zdroj: |
Strength of Materials; September 1979, Vol. 11 Issue: 9 p999-1002, 4p |
| Abstrakt: |
1.We found that the metal of welds obtained with UONI 13/55 electrodes and welds of steel 10G2S1 have a high resistance to fatigue crack growth at low temperatures.2.Embrittlement of the weld metal with decreasing temperature is due to a certain degree to the formation of a coarse-grained structure during welding.3.An increase in impact-test temperature and increase in the number of fatigue-loading cycles produces a tendency toward grain-boundary embrittlement in the region of the coarsegrained structure appearing during welding, this tendency in turn being associated with a reduction in impact toughness.4.Both a reduction in impact-test temperature and an increase in the number of load cycles lead to twinning, which shows up in the fractures in the form of tongues on the cleavage facets. This is evidence of the partial substitution of twinning for slip as the fracture mechanism at lower temperatures. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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