Quan, G.-Z., Wu, D.-S., Mao, A., Zhang, Y.-D., Xia, Y.-F., Zhou, J.
24485306400;55770876600;55770438400;55864008100;36337963000;56510510800;
Constitutive Modeling for Tensile Behaviors of Ultra-high-strength-steel BR1500HS at Different Temperatures and Strain Rates
(2015) High Temperature Materials and Processes, 34 (5), pp. 407-416. 被引用 3 次.
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84941660899&doi=10.1515%2fhtmp-2014-0074&partnerID=40&md5=21956cc2cb7e25f5aec67402f394ba02

DOI: 10.1515/htmp-2014-0074
归属机构: School of Material Science and Engineering, Chongqing University, Chongqing, 400044, China
摘要: In order to investigate the tensile deformation behavior of ultra-high-strength-steel BR1500HS, a series of isothermal tensile experiments were carried out in a temperature range of 10231123 K and a strain rate range of 0.0110 s-1 on a Gleeble-3500 thermo-mechanical simulator. The results indicate that the flow stress initially increases to a peak value and then decreases gradually to a steady state. Based on the analysis of the effect of strain, temperature and strain rate on flow stress, dynamic recrystallization (DRX) type softening characteristics of the stress-strain curve with single peak were identified. The flow stress level decreases with increasing temperature and decreasing strain rate. By regression analysis for Arrhenius type equation, the hot deformation activation energy Q and material constants (n, α, β and A) were calculated. Further, the Arrhenius-type constitutive equation of flow stress was developed by considering the effect of strain on the variable coefficients (including activation energy Q, material constants n, α, and A). The validity of the developed constitutive equation incorporating the influence of strain was evaluated through comparing the experimental and predicted data. Furthermore, the predictability of the developed model was also evaluated using two standard statistical parameters, correlation coefficient (R) and average absolute relative error (AARE). And R-value and AARE-value for the model are 0.997 and 4.06% respectively, which indicates that the developed model can precisely estimate the flow behavior for BR1500HS alloy throughout the entire temperature and strain rate range. © 2015 by De Gruyter.
作者关键字: constitutive equation;  flow stress;  material constants;  microstructure evolution;  Ultra-high-strength-steel BR1500HS
索引关键字: Activation analysis; Activation energy; Chemical activation; Constitutive equations; Deformation; Dynamic recrystallization; Microstructure; Plastic flow; Regression analysis; Steel heat treatment; Strain rate; Stress-strain curves; Tensile strength, Arrhenius-type equation; Dynamic recrystallization (DRX); Hot deformation activation energies; Increasing temperatures; Material constant; Micro-structure evolutions; Thermomechanical simulator; Ultra high strength steel, High strength steel
通讯地址: Quan, G.-Z.; School of Material Science and Engineering, Chongqing UniversityChina
出版商: Walter de Gruyter GmbH and Co. KG
ISSN: 03346455
CODEN: HTMPE
原始文献语言: English
来源出版物名称缩写: High Temp Mater Processes
文献类型: Article
来源出版物: Scopus