Next Article in Journal
Ab Initio Study of the Combined Effects of Alloying Elements and H on Grain Boundary Cohesion in Ferritic Steels
Previous Article in Journal
Coarse Grained Heat-Affected Zone Microstructure and Brittleness of Ti-Nb-B Microalloyed High Toughness and Wear Resistant Steel
Article Menu
Issue 3 (March) cover image

Export Article

Open AccessArticle
Metals 2019, 9(3), 290; https://doi.org/10.3390/met9030290

Description of Hot Compressive Stress-Strain Curves Using Transfer Functions

Institute of Metals and Technology, 1000 Ljubljana, Slovenia
*
Author to whom correspondence should be addressed.
Received: 16 January 2019 / Revised: 13 February 2019 / Accepted: 26 February 2019 / Published: 4 March 2019
Full-Text   |   PDF [1543 KB, uploaded 8 March 2019]   |  

Abstract

Mathematical descriptions of true stress/true strain curves, experimentally obtained on cylindrical specimens under hot compressive conditions, are of great importance and are widely investigated. An additional black-box modelling approach using transfer functions (TF) is tested. For tested 51CrV4 steel, a TF of third order is employed for description of true stress (output) depending on the strain rate (input). Sets of TF coefficients are determined using numerical optimization techniques for each testing temperature and strain rate. To avoid scattering of TF parameters, time in Laplacian transformation is replaced with strain, while TF input is the strain rate. Obtained models cover deformations starting practically from zero to 0.7. Average absolute relative error for models based on TF of the third order and of the second order are 0.93% and 3.64%. View Full-Text
Keywords: hot deformation; transfer function; Laplacian transformation; numerical optimization hot deformation; transfer function; Laplacian transformation; numerical optimization
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Vode, F.; Malej, S.; Arh, B.; Tehovnik, F.; Podgornik, B. Description of Hot Compressive Stress-Strain Curves Using Transfer Functions. Metals 2019, 9, 290.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top