Superplasticity of Inconel 718 after processing by high-pressure sliding (HPS)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F17%3A00476917" target="_blank" >RIV/68081723:_____/17:00476917 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.msea.2016.11.081" target="_blank" >http://dx.doi.org/10.1016/j.msea.2016.11.081</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2016.11.081" target="_blank" >10.1016/j.msea.2016.11.081</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Superplasticity of Inconel 718 after processing by high-pressure sliding (HPS)

Popis výsledku v původním jazyce

This study reports a production of a superplastic Ni-based superalloy (Inconel 718) using a process of severe plastic deformation through high-pressure sliding (HPS). The grain size of the alloy was reduced to similar to 120 nm by operating the HPS process under 4 GPa at room temperature with a recently upscaled facility. The ultrafined-grained structure was well retained even after annealing at 1173 K for 1 h. Tensile tests were conducted in air at a testing temperature in the range of 973-1173 K with an initial strain rate of 5.0 x 10(-4)-2.0 x10(-2) s(-1). Superplastic elongation more than 400% were attained at all testing conditions except at 973 K. High-strain rate superplasticity (defined with strain rates higher than 1x10(-2) s(-1)) was achieved at temperatures higher than 1073 K. Electron back scatter diffraction analyses revealed that a preferential orientation of the grains was developed by the HPS processing but it was randomized with tensile deformation. Evaluation of the strain rate sensitivity and the activation energy for the superplastic deformation confirmed that the superplasticity of Inconel 718 was controlled by grain boundary sliding through lattice diffusion.

Název v anglickém jazyce

Superplasticity of Inconel 718 after processing by high-pressure sliding (HPS)

Popis výsledku anglicky

This study reports a production of a superplastic Ni-based superalloy (Inconel 718) using a process of severe plastic deformation through high-pressure sliding (HPS). The grain size of the alloy was reduced to similar to 120 nm by operating the HPS process under 4 GPa at room temperature with a recently upscaled facility. The ultrafined-grained structure was well retained even after annealing at 1173 K for 1 h. Tensile tests were conducted in air at a testing temperature in the range of 973-1173 K with an initial strain rate of 5.0 x 10(-4)-2.0 x10(-2) s(-1). Superplastic elongation more than 400% were attained at all testing conditions except at 973 K. High-strain rate superplasticity (defined with strain rates higher than 1x10(-2) s(-1)) was achieved at temperatures higher than 1073 K. Electron back scatter diffraction analyses revealed that a preferential orientation of the grains was developed by the HPS processing but it was randomized with tensile deformation. Evaluation of the strain rate sensitivity and the activation energy for the superplastic deformation confirmed that the superplasticity of Inconel 718 was controlled by grain boundary sliding through lattice diffusion.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Materials Science and Engineering A-Structural materials

ISSN

0921-5093

e-ISSN

—

Svazek periodika

682

Číslo periodika v rámci svazku

JAN

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

603-612

Kód UT WoS článku

000393003800069

EID výsledku v databázi Scopus

2-s2.0-84998910280