Open AccessMECHANICAL PROPERTIES OF P91 AND PB2 STEEL AFTER LONG-TERM AGEING AT 620°C
Author(s) -
G. Golański
Publication year - 2022
Publication title -
journal of metallic materials
Language(s) - English
Resource type - Journals
ISSN - 2657-747X
DOI - 10.32730/imz.2657-747.21.3.1
Subject(s) - charpy impact test , ageing , materials science , ductility (earth science) , vickers hardness test , ultimate tensile strength , metallurgy , boron , tensile testing , microstructure , composite material , chemistry , creep , medicine , organic chemistry
The article presents the results of research on mechanical propertiesof martensitic steels, X10CrMoVNb9-1 (P91) and X13CrMo-CoVNbNB9-2-1 (PB2), as-received and after 50,000 hours of ageingat 620˚C. The scope of the tests of mechanical properties includeda Vickers hardness test, Charpy impact test, and static tensile test.As received, the investigated steels were characterised by relativelyhigh mechanical properties. The long-term effect of temperatureand time contributed to a relatively slight decrease in the strengthproperties and hardness of the tested steels. However, a considerabledecrease in the ductility of these alloys was observed. The decreasein mechanical properties after long-term ageing was smaller in thecase of the PB2 steel, which was attributed to the beneficial effect ofmicroalloying boron.