Počet záznamů: 1  

The effect of a prior short-term ageing on mechanical and creep properties of P92 steel

  1. 1.
    0485725 - ÚFM 2019 RIV US eng J - Článek v odborném periodiku
    Sklenička, Václav - Kuchařová, Květa - Svobodová, M. - Král, Petr - Kvapilová, Marie - Dvořák, Jiří
    The effect of a prior short-term ageing on mechanical and creep properties of P92 steel.
    Materials Characterization. Roč. 136, FEB (2018), s. 388-397. ISSN 1044-5803. E-ISSN 1873-4189
    Grant CEP: GA ČR(CZ) GA16-09518S; GA MŠMT LM2015069
    Institucionální podpora: RVO:68081723
    Klíčová slova: ASTM Grade P92 steel * Isothermal ageing * Mechanical properties * Creep testing * Microstructure evolution * Creep life
    Obor OECD: Materials engineering
    Impakt faktor: 3.220, rok: 2018

    We have investigated the effect of prior short-term ageing on the mechanical and creep properties of tungsten and boron modified 9%Cr ferritic steel (ASTM Grade P92 steel), to provide material data base for the estimation of material degradation due to occurrence of accidental overheating in the early stage of service loading. The steel was aged at 650 °C for up to 100, 200, 500, 1000, 2000 and 5000 h prior to mechanical and creep testing. Changes in the microstructure during ageing had a slight effect on the reduction of room temperature tensile properties. A sudden decrease on impact properties occurred after ageing for 2000 h, but the occurred impact energy of about 70 J is in accordance with the specified minimum value of 68 J at room temperature for the virgin condition.
    The creep behaviour of P92 steel in the as-received condition and after different isothermal ageing exposures prior to creep was investigated at 600 and 650 °C in the power-law creep regime. The initial applied tensile stress ranged from 90 to 200 MPa. The results clearly show a detrimental influence of isothermal ageing on creep properties even after a few hundred hours. Based on microstructure analysis, which was done mostly in a qualitative way, a significant decrease in the creep life after ageing resulted from changes of the dislocation substructure and instability of Laves phase and M23C6 particles.

    Trvalý link: http://hdl.handle.net/11104/0286639

Počet záznamů: 1  

  Tyto stránky využívají soubory cookies, které usnadňují jejich prohlížení. Další informace o tom jak používáme cookies.