Influence of High Pressure Sliding and Rotary Swaging on Creep Behavior of P92 Steel at 500 ◦C

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F21%3A00549844" target="_blank" >RIV/68081723:_____/21:00549844 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2075-4701/11/12/2044" target="_blank" >https://www.mdpi.com/2075-4701/11/12/2044</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met11122044" target="_blank" >10.3390/met11122044</a>

Result language

angličtina

Original language name

Influence of High Pressure Sliding and Rotary Swaging on Creep Behavior of P92 Steel at 500 ◦C

Original language description

High-pressure sliding (HPS) and rotary swaging (RS) at room temperature were used to form severely deformed microstructures in martensitic creep-resistant P92 steel. The deformed microstructures contained markedly different ratios of low- and high-angle grain boundaries (LAGBs/HAGBs). The application of the RS method, with an imposed equivalent strain of 1.4, led to thenformation of a heterogeneous microstructure with a high number of LAGBs, while the HPS method, with an imposed equivalent strain of 7.8, led to the formation of a relatively homogeneous ultrafine-grained microstructure with a significant predominance of HAGBs. Microstructure analyses after creep testing showed that the microstructure of RS- and HPS-processed P92 steel is quite stable, but a slight coarsening of subgrains and grains during creep testing can be observed. Constant load tensile creep tests at 500 ◦C and initial stresses ranging from 300 to 900 MPa revealed that the specimens processed by HPS exhibited higher creep strength (slower minimum creep rate) and ductility compared to the coarse-grained and RS-processed P92 steel. However, the HPS-processed P92 steel also exhibited lower values of stress exponent n than the other investigated states of P92 steel. For this reason, the differences in minimum creep rates determined for different states decrease with decreasing values of applied stress, and at applied stresses lower than 500 MPa, the creep resistance of the RS-processed state is higher than the creep resistance of the HPS-processed state.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/GA19-18725S" target="_blank" >GA19-18725S: Influence of microstructure on creep mechanisms in advanced heat resistant steels</a><br>

Continuities

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

Publication year

2021

Confidentiality

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

Name of the periodical

Metals

ISSN

2075-4701

e-ISSN

2075-4701

Volume of the periodical

11

Issue of the periodical within the volume

12

Country of publishing house

CH - SWITZERLAND

Number of pages

19

Pages from-to

2044

UT code for WoS article

000736767800001

EID of the result in the Scopus database

2-s2.0-85121102751