Reasearch on Hardness and Fracture Toughness of 45 Steel before and after Hydrogen Sulfide Corrosion
- DOI
- 10.2991/msmee-17.2017.235How to use a DOI?
- Keywords
- Fracture Toughness; Corrosion; Fatigue.
- Abstract
The fracture toughness of No.45 steel before and after corrosion is studied in this paper.Two experiments have been carried out about hardness experiment and COD experiment before and after corrosion. And the influence of corrosion condition of the hardness increment and fracture toughness is analyzed here. From the hardness test, we find that the hardness of No.45 steel rise at first and then fall down to the original hardness, and the maximum increment of No.45 steel is 21.From the COD experiment, we find that the stress intensity factor of No.45 steel before and after corrosion are 190.7Mpam1/2 and 149.8 Mpam1/2 respectively while their corresponding average stress of crack tip are 1076Mpa and 845.6Mpa.It can be seen that hydrogen sulfide corrosion increases the brittle facture sensitivity of 45 steel, reduces the fracture toughness, and produces crack tip stress of 230.5Mpa. When we take the hardness of the experimental results into the hardness – stress calibration formula, the hydrogen corrosion generates 239Mpa hydrogen stress. The results of experiment hardness experiment and COD experiment are less than 10% of the crack stress in the COD experiment, which proves that hydrogen corrosion will cause hydrogen stress and then lead to the decrease of fracture toughness.
- Copyright
- © 2017, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Yanfei Sun AU - Jing Wang PY - 2017/05 DA - 2017/05 TI - Reasearch on Hardness and Fracture Toughness of 45 Steel before and after Hydrogen Sulfide Corrosion BT - Proceedings of the 2017 2nd International Conference on Materials Science, Machinery and Energy Engineering (MSMEE 2017) PB - Atlantis Press SP - 1248 EP - 1254 SN - 2352-5401 UR - https://doi.org/10.2991/msmee-17.2017.235 DO - 10.2991/msmee-17.2017.235 ID - Sun2017/05 ER -