Influence of Calculation Method on Value of Activation Energy in Hot Forming
Influence of the methodology of mathematical processing of experimental data on the calculated value of the activation energy in hot forming was evaluated for three very different alloys: iron aluminide, low-alloyed steel and magnesium alloy. Application of the mean strain rates is appropriate but c...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2013-04-01
|
| Series: | High Temperature Materials and Processes |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/htmp-2012-0106 |
| _version_ | 1818728178077663232 |
|---|---|
| author | Schindler I. Kawulok P. Kawulok R. Hadasik E. Kuc D. |
| author_facet | Schindler I. Kawulok P. Kawulok R. Hadasik E. Kuc D. |
| author_sort | Schindler I. |
| collection | DOAJ |
| description | Influence of the methodology of mathematical processing of experimental data on the calculated value of the activation energy in hot forming was evaluated for three very different alloys: iron aluminide, low-alloyed steel and magnesium alloy. Application of the mean strain rates is appropriate but calculations with use of nominal strain rates of the plastometric tests do not give significantly different results. Calculations based on the processing of the simplified power dependence between strain rate and peak stress can give the results differing very substantially from those that were gained by the solution of the complex hyperbolic relationship. This has negative impacts, particularly at prediction of the maximum flow stress in the broad range of forming conditions, represented by the Zener-Hollomon parameter. |
| first_indexed | 2024-12-17T22:25:51Z |
| format | Article |
| id | doaj.art-004a38fc087041ba9cb3cabb1f704698 |
| institution | Directory Open Access Journal |
| issn | 0334-6455 2191-0324 |
| language | English |
| last_indexed | 2024-12-17T22:25:51Z |
| publishDate | 2013-04-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | High Temperature Materials and Processes |
| spelling | doaj.art-004a38fc087041ba9cb3cabb1f7046982022-12-21T21:30:20ZengDe GruyterHigh Temperature Materials and Processes0334-64552191-03242013-04-0132214915510.1515/htmp-2012-0106Influence of Calculation Method on Value of Activation Energy in Hot FormingSchindler I.Kawulok P.0Kawulok R.1Hadasik E.2Kuc D.3VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, 708 33 Ostrava, Czech RepublicVŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, 17. listopadu 15, 708 33 Ostrava, Czech RepublicSilesian University of Technology, Faculty of Materials Engineering and Metallurgy, Krasińskiego 8, 40-019 Katowice, PolandSilesian University of Technology, Faculty of Materials Engineering and Metallurgy, Krasińskiego 8, 40-019 Katowice, PolandInfluence of the methodology of mathematical processing of experimental data on the calculated value of the activation energy in hot forming was evaluated for three very different alloys: iron aluminide, low-alloyed steel and magnesium alloy. Application of the mean strain rates is appropriate but calculations with use of nominal strain rates of the plastometric tests do not give significantly different results. Calculations based on the processing of the simplified power dependence between strain rate and peak stress can give the results differing very substantially from those that were gained by the solution of the complex hyperbolic relationship. This has negative impacts, particularly at prediction of the maximum flow stress in the broad range of forming conditions, represented by the Zener-Hollomon parameter.https://doi.org/10.1515/htmp-2012-0106hot formingmetal and alloysstrain ratestress-strain curveactivation energyregression analysis |
| spellingShingle | Schindler I. Kawulok P. Kawulok R. Hadasik E. Kuc D. Influence of Calculation Method on Value of Activation Energy in Hot Forming High Temperature Materials and Processes hot forming metal and alloys strain rate stress-strain curve activation energy regression analysis |
| title | Influence of Calculation Method on Value of Activation Energy in Hot Forming |
| title_full | Influence of Calculation Method on Value of Activation Energy in Hot Forming |
| title_fullStr | Influence of Calculation Method on Value of Activation Energy in Hot Forming |
| title_full_unstemmed | Influence of Calculation Method on Value of Activation Energy in Hot Forming |
| title_short | Influence of Calculation Method on Value of Activation Energy in Hot Forming |
| title_sort | influence of calculation method on value of activation energy in hot forming |
| topic | hot forming metal and alloys strain rate stress-strain curve activation energy regression analysis |
| url | https://doi.org/10.1515/htmp-2012-0106 |
| work_keys_str_mv | AT schindleri influenceofcalculationmethodonvalueofactivationenergyinhotforming AT kawulokp influenceofcalculationmethodonvalueofactivationenergyinhotforming AT kawulokr influenceofcalculationmethodonvalueofactivationenergyinhotforming AT hadasike influenceofcalculationmethodonvalueofactivationenergyinhotforming AT kucd influenceofcalculationmethodonvalueofactivationenergyinhotforming |