Plastic properties of steel AISI 4140 influenced by strain rate and temperature

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F18%3A10241088" target="_blank" >RIV/61989100:27360/18:10241088 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Plastic properties of steel AISI 4140 influenced by strain rate and temperature

Original language description

Deformation behavior of continuously cast steel with 0.43 % C, 1.01 % Cr and 0.19 % Mo was studied in the austenite region. Its solidus temperature was calculated as 1435 oC and the nil strength temperature at heating was determined as 1402 oC using a special testing method. Hot ductility was measured by means of the uniaxial tensile tests in wide range of mean strain rate (0.00074 - 63 s-1) and temperature (800 - 1375 oC). At medium strain rate of 0.65 s-1, formability steadily increased to a temperature of approx. 1335 oC and then sharply dropped as a result of overheating and burning of the steel. The nil ductility temperature was determined as 1365 oC in this case. Influence of strain rate on formability was evaluated at two temperature values corresponding to relatively poor and/or good plastic properties. At a temperature of 900 oC, ductility increased rather moderately with the increasing strain rate. At a temperature of 1280 oC, the growth of ductility at increasing strain rate was sharper and both dependencies intersected at a strain rate of approx. 0.008 s-1. Formability was improved by higher temperature at high strain rates and deteriorated at very low strain rates, which is a quite unique result. It was not possible to determine the value of the strain rate corresponding to the local maximum of ductility, even if applying the strain rate range of 6 orders. SEM analysis of the broken samples confirmed the expected influence of microstructure development on hot formability.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/LO1203" target="_blank" >LO1203: Regional Materials Science and Technology Centre - Feasibility Program</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2018

Confidentiality

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

Article name in the collection

METAL 2018 : conference proceedings : reviewed version : 27th International Conference on Metallurgy and Materials : May 23rd-25th 2018, Hotel Voronez I, Brno, Czech Republic, EU

ISBN

978-80-87294-84-0

ISSN

—

e-ISSN

neuvedeno

Number of pages

6

Pages from-to

401-406

Publisher name

Tanger

Place of publication

Ostrava

Event location

Brno

Event date

May 23, 2018

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—