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Creep and LCF Behaviors of Newly Developed Advanced Heat Resistant Austenitic Stainless Steel for A-USC
Linköping University, Department of Management and Engineering, Engineering Materials. Linköping University, The Institute of Technology. Sandvik Materials Technology, Sandviken, Sweden.
Sandvik Materials Technology, Sandviken, Sweden.
Sandvik Materials Technology, Sandviken, Sweden.
Sandvik Materials Technology, Sandviken, Sweden.
2013 (English)In: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 55, 232-239 p.Article in journal (Refereed) Published
Abstract [en]

Austenitic stainless steel grade UNS S31035 (Sandvik Sanicro® 25) has been developed for use in super-heaters and reheaters in the next generation of A-USC power plants. This new grade shows very good resistances to steam oxidation and hot corrosion, and higher creep rupture strength than other austenitic stainless steels available today. This makes it an interesting alternative for super-heaters and reheaters in future high-efficient coal fired boilers. This paper will mainly focus on the study of the creep and LCF behavior of the material at temperatures from 600 °C to 750 °C by using TEM and ECCI. The mechanisms at different temperatures and loading conditions have been identified. The interactions between dislocations and precipitates and their contribution to the creep rupture strength have been discussed. In this paper, different models have been used to evaluate the long-term creep behavior of the grade. A creep rupture strength near 100 MPa at 700 °C for 100 000 h has been predicted.

Place, publisher, year, edition, pages
Elsevier, 2013. Vol. 55, 232-239 p.
Keyword [en]
heat resistant austenitic stainless steel; superheater, A-USC; creep; fatigue
National Category
Engineering and Technology Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-91924DOI: 10.1016/j.proeng.2013.03.248ISI: 000335733500038OAI: oai:DiVA.org:liu-91924DiVA: diva2:619748
Conference
6th International Conference on Creep, Fatigue and Creep-Fatigue Interaction
Available from: 2013-05-06 Created: 2013-05-06 Last updated: 2017-12-06Bibliographically approved

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Chai, Guocai

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