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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68407700:21340/16:00306246 RIV/26722445:_____/16:N0000026

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JF - Jaderná energetika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Nuclear Materials

ISSN

0022-3115

e-ISSN

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Svazek periodika

472

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

47-54

Kód UT WoS článku

000373489700007

EID výsledku v databázi Scopus

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