Quan, G., Pu, S., Wen, H., Zou, Z., Zhou, J.
24485306400;56531478900;56704231900;56808679300;56510510800;
Quantitative Analysis of Dynamic Softening Behaviors Induced by Dynamic Recrystallization for Ti-10V-2Fe-2Al Alloy
(2015) High Temperature Materials and Processes, 34 (6), pp. 549-561. 被引用 8 次.
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84942851979&doi=10.1515%2fhtmp-2014-0106&partnerID=40&md5=700e1f72b1042c26cf76d6b263f44b8a

DOI: 10.1515/htmp-2014-0106
归属机构: College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China
摘要: In order to investigate the effect of dynamic recrystallization (DRX) behavior on dynamic softening behavior of wrought Ti-10V-2Fe-3Al titanium alloy, a series of laboratory scale isothermal hot compression tests with a height reduction of 60% were performed in a temperature range of 948 K∼1023 K in the (σ + β) phase field, and a strain rate range of 0.01∼10 s-1 on a Gleeble-3500 thermo-mechanical simulator. The flow curves show a continuous softening at all strain rate after peak stress. The constitutive equation and the DRX kinetic mold were established to study the dynamic softening based on the flow curves. By the regression analysis for conventional hyperbolic sine equation, the activation energy was determined as Q=479.4169 kJ•mol-1, According to the strain hardening rate curves (dσ/dε versus σ), two characteristic parameters including the critical strain for DRX initiation (ε<inf>c</inf>) and the strain for peak stress (ε<inf>p</inf>) were identified, and the linear dependence of the critical strain (ε<inf>c</inf>) for DRX initiation on the strain for peak stress (ε<inf>p</inf>) can be specified by the equation: ε<inf>c</inf>=0.5667ε<inf>p</inf>. A modified Avrami type equation XDRX=1- exp[βd(ε-εcε0.5 )]{X<inf>DRX</inf> = 1 - exp[-βd/0.5(k)d} was introduced to characterize the evolution of DRX volume fraction. The evolution of DRX volume was described as the following: for a fixed strain rate, the strain required for the same amount of DRX volume fraction increases with decreasing deformation temperature, in contrast, for a fixed temperature, it increases with increasing strain rate. Finally, the impact of dynamic recrystallized behavior on degree of dynamic softening became weaker and weaker with the increasing of temperature for the strain rate of 0.01 s-1, 0.1 s-1, 1 s-1 and 10 s-1, due to the volume of α phase decreased with the increasing of temperature. © 2015 by De Gruyter 2015.
作者关键字: critical strain;  dynamic recrystallization;  flow stress;  relative softening;  titanium alloy
索引关键字: Activation analysis; Activation energy; Aluminum; Compression testing; Dynamic recrystallization; Hot pressing; Plastic flow; Recrystallization (metallurgy); Regression analysis; Strain hardening; Titanium; Titanium alloys; Volume fraction, Critical strains; Deformation temperatures; Dynamic recrystallization (DRX); Fixed temperature; Hyperbolic sine equation; relative softening; Strain hardening rate; Thermomechanical simulator, Strain rate
通讯地址: Quan, G.; College of Materials 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