Effect of thermal exposure in helium on mechanical properties and microstructure of 316L and P91

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F16%3AN0000080" target="_blank" >RIV/26722445:_____/16:N0000080 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/16:00306246 RIV/26722445:_____/16:N0000026
Result on the web
<a href="http://dx.doi.org/10.1016/j.jnucmat.2016.01.020" target="_blank" >http://dx.doi.org/10.1016/j.jnucmat.2016.01.020</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jnucmat.2016.01.020" target="_blank" >10.1016/j.jnucmat.2016.01.020</a>

Result language
angličtina
Original language name
Effect of thermal exposure in helium on mechanical properties and microstructure of 316L and P91
Original language description
In this paper, the effects of high temperature exposure in air as well as in impure He on mechanical properties of 316L and P91 steels were investigated. The experimental programme was part of material design of new experimental facility - high temperature helium loop. Some of the specimens were exposed in air at 750 degrees C for up to 1000 h. Another set of specimens were exposed in impure helium containing 1 ppmv CO2, 2 ppmv O-2, 35 ppmv CH4, 250 ppmv CO and 400 ppmv H-2 at 750 degrees C for up to 1000 h. Metalographical analysis, tensile tests, fracture toughness and hardness tests of exposed and non-exposed specimens were carried out. After the exposure both in air and He, the ultimate tensile strength of P91 decreased significantly more than that of 316L. After the exposure in He, the fracture toughness of 316L was reduced to 60% while fracture toughness of P91 showed no significant changes. The hardness of P91 decreased with exposure time in air. The measurement of the hardness of 316L was very scattered the most probably due to the heterogeneities in microstructure, the trend was not possible to evaluate.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JF - Nuclear energy
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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