A Characterization for the Hot Flow Behaviors of As-extruded 7050 Aluminum Alloy
The deep understanding of flow behaviors of as-extruded 7050 aluminum alloy significantly contributes to the accuracy simulation for its various plastic forming processes. In order to obtain the improved Arrhenius-type equation with variable parameters for this alloy, a series of compression tests w...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
De Gruyter
2015-11-01
|
Series: | High Temperature Materials and Processes |
Subjects: | |
Online Access: | https://doi.org/10.1515/htmp-2014-0108 |
id |
doaj-3ab30242916f4d998406ab5f61e62cef |
---|---|
record_format |
Article |
spelling |
doaj-3ab30242916f4d998406ab5f61e62cef2021-09-06T19:19:53ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242015-11-0134764365010.1515/htmp-2014-0108A Characterization for the Hot Flow Behaviors of As-extruded 7050 Aluminum AlloyQuan Guo-zheng0Liu Jin1Mao An2Liu Bo3Zhang Jin-sheng4School of Material Science and Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Material Science and Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Material Science and Engineering, Chongqing University, Chongqing 400044, ChinaChongqing Changan Automobile Co., Ltd., Chongqing 400023, ChinaChongqing Changan Automobile Co., Ltd., Chongqing 400023, ChinaThe deep understanding of flow behaviors of as-extruded 7050 aluminum alloy significantly contributes to the accuracy simulation for its various plastic forming processes. In order to obtain the improved Arrhenius-type equation with variable parameters for this alloy, a series of compression tests were performed at temperatures of 573 K, 623 K, 673 K, 723 K and strain rates of 0.01 s−1, 0.1 s−1, 1 s−1, 10 s−1 with a height reduction of 60% on Gleeble-1500 thermo-mechanical simulator. It is obvious that strain rate, strain and temperature all have a significant effect on the hot flow behaviors, and the true stress–true strain curves indicate three types after the peak value: decreasing gradually to a steady state with sustaining DRX softening till a balance with work hardening, decreasing continuously with sustaining increasing DRX softening beyond work hardening and maintaining higher stress level after the peak value with a balance between work hardening and DRV softening. Based on the experimental data, the improved Arrhenius-type constitutive model was established to predict the high temperature flow stress of as-extruded 7050 aluminum alloy. The accuracy and reliability of the improved Arrhenius-type model were further evaluated in terms of the correlation coefficient (R), here 0.98428, the average absolute relative error (AARE), here 3.5%. The results indicate that the improved Arrhenius-type constitutive model presents a good predictable ability.https://doi.org/10.1515/htmp-2014-0108flow behaviorconstitutive model7050 aluminum alloy81. material science |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Quan Guo-zheng Liu Jin Mao An Liu Bo Zhang Jin-sheng |
spellingShingle |
Quan Guo-zheng Liu Jin Mao An Liu Bo Zhang Jin-sheng A Characterization for the Hot Flow Behaviors of As-extruded 7050 Aluminum Alloy High Temperature Materials and Processes flow behavior constitutive model 7050 aluminum alloy 81. material science |
author_facet |
Quan Guo-zheng Liu Jin Mao An Liu Bo Zhang Jin-sheng |
author_sort |
Quan Guo-zheng |
title |
A Characterization for the Hot Flow Behaviors of As-extruded 7050 Aluminum Alloy |
title_short |
A Characterization for the Hot Flow Behaviors of As-extruded 7050 Aluminum Alloy |
title_full |
A Characterization for the Hot Flow Behaviors of As-extruded 7050 Aluminum Alloy |
title_fullStr |
A Characterization for the Hot Flow Behaviors of As-extruded 7050 Aluminum Alloy |
title_full_unstemmed |
A Characterization for the Hot Flow Behaviors of As-extruded 7050 Aluminum Alloy |
title_sort |
characterization for the hot flow behaviors of as-extruded 7050 aluminum alloy |
publisher |
De Gruyter |
series |
High Temperature Materials and Processes |
issn |
0334-6455 2191-0324 |
publishDate |
2015-11-01 |
description |
The deep understanding of flow behaviors of as-extruded 7050 aluminum alloy significantly contributes to the accuracy simulation for its various plastic forming processes. In order to obtain the improved Arrhenius-type equation with variable parameters for this alloy, a series of compression tests were performed at temperatures of 573 K, 623 K, 673 K, 723 K and strain rates of 0.01 s−1, 0.1 s−1, 1 s−1, 10 s−1 with a height reduction of 60% on Gleeble-1500 thermo-mechanical simulator. It is obvious that strain rate, strain and temperature all have a significant effect on the hot flow behaviors, and the true stress–true strain curves indicate three types after the peak value: decreasing gradually to a steady state with sustaining DRX softening till a balance with work hardening, decreasing continuously with sustaining increasing DRX softening beyond work hardening and maintaining higher stress level after the peak value with a balance between work hardening and DRV softening. Based on the experimental data, the improved Arrhenius-type constitutive model was established to predict the high temperature flow stress of as-extruded 7050 aluminum alloy. The accuracy and reliability of the improved Arrhenius-type model were further evaluated in terms of the correlation coefficient (R), here 0.98428, the average absolute relative error (AARE), here 3.5%. The results indicate that the improved Arrhenius-type constitutive model presents a good predictable ability. |
topic |
flow behavior constitutive model 7050 aluminum alloy 81. material science |
url |
https://doi.org/10.1515/htmp-2014-0108 |
work_keys_str_mv |
AT quanguozheng acharacterizationforthehotflowbehaviorsofasextruded7050aluminumalloy AT liujin acharacterizationforthehotflowbehaviorsofasextruded7050aluminumalloy AT maoan acharacterizationforthehotflowbehaviorsofasextruded7050aluminumalloy AT liubo acharacterizationforthehotflowbehaviorsofasextruded7050aluminumalloy AT zhangjinsheng acharacterizationforthehotflowbehaviorsofasextruded7050aluminumalloy AT quanguozheng characterizationforthehotflowbehaviorsofasextruded7050aluminumalloy AT liujin characterizationforthehotflowbehaviorsofasextruded7050aluminumalloy AT maoan characterizationforthehotflowbehaviorsofasextruded7050aluminumalloy AT liubo characterizationforthehotflowbehaviorsofasextruded7050aluminumalloy AT zhangjinsheng characterizationforthehotflowbehaviorsofasextruded7050aluminumalloy |
_version_ |
1717777607155515392 |