Hot Tensile Deformation Mechanism and Dynamic Softening Behavior of Ti–6Al–4V Alloy with Thick Lamellar Microstructures

2020 ◽  
Vol 22 (3) ◽  
pp. 1901193 ◽  
Author(s):  
Y. C. Lin ◽  
Qiao Wu ◽  
Guo-Dong Pang ◽  
Xing-You Jiang ◽  
Dao-Guang He
Keyword(s):  
Deformation Mechanism ◽  
Tensile Deformation ◽  
Softening Behavior ◽  
Dynamic Softening ◽  
Hot Tensile Deformation

scholarly journals Hot Tensile Deformation Behavior of Mg-4Li-1Al-0.5Y Alloy

2021 ◽  
Vol 8 ◽  
Author(s):  
Ting Yang ◽  
Zhuohua Li ◽  
Jinhui Wang ◽  
Peipeng Jin
Keyword(s):  
Deformation Mechanism ◽  
Deformation Temperature ◽  
Tensile Deformation ◽  
Peak Stress ◽  
True Stress ◽  
Mg Alloy ◽  
Boundary Slip ◽  
Tensile Deformation Behavior ◽  
Hot Tensile Deformation ◽  
Result Analysis

The microstructure evolution and deformation mechanism of the as-extruded-annealed Mg-4Li-1Al-0.5Y alloy (denoted as LAY410) were investigated during the hot tensile deformation at the temperatures between 150°C and 300°C with strains from 8 × 10−5 s−1 to 1.6 × 10−3 s−1. The results show that when the strain rate decreases and/or the deformation temperature increases, the peak stress of the alloy gradually decreases, and the elongations to fracture gradually increases. The true stress–strain curves show typical dynamic recrystallization (DRX) softening characteristics. It is observed that the microstructure in the magnesium (Mg) alloy deformed at 150°C is mainly composed of the deformed grains and a few recrystallized grains. The microstructures in the Mg alloy deformed at 200°C consisted of substructures and a slightly increasing number of dynamic recrystallized grains. When the deformation temperature reaches 250°C, the number of recrystallized grains increases significantly, and the microstructures are dominated by recrystallized grains. Moreover, through theoretical calculation and result analysis, the activation energy was about 99.3 kJ/mol, and the hot tensile deformation mechanism was the alternate coordinated deformation mechanism among grain boundary slip (GBS), intragranular slip, and DRX.

Hot tensile deformation mechanism and constitutive equation of AZ61Ce magnesium alloy sheets

2019 ◽  
Vol 6 (11) ◽  
pp. 116517 ◽  
Author(s):  
Zhenxiong Wei ◽  
Zongwen Ma ◽  
Zhongjun Wang ◽  
Jing Zhu ◽  
Li Tang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Constitutive Equation ◽  
Deformation Mechanism ◽  
Tensile Deformation ◽  
Hot Tensile Deformation

A Numerical and Experimental Study of Cavitation in a Hot Tensile Axisymmetric Testpiece

2005 ◽  
Vol 40 (6) ◽  
pp. 571-586 ◽  
Author(s):  
Y Liu ◽  
J Lin ◽  
T. A Dean ◽  
D. C. J Farrugia
Keyword(s):  
Experimental Study ◽  
Flow Stress ◽  
Grain Boundary ◽  
Thermal Gradient ◽  
Tensile Testing ◽  
Tensile Deformation ◽  
Strain Rates ◽  
Test Results ◽  
Integrated Technique ◽  
Hot Tensile Deformation

During axisymmetric hot tensile testing, necking normally takes place due to the thermal gradient and the accumulation of microdamage. This paper introduces an integrated technique to predict the damage and necking evolution behaviour. Firstly, a set of multiaxial mechanism-based unified viscoplastic-damage constitutive equations is presented. This equation set, which models the evolution of grain boundary (intragranular) and plasticity-induced (intergranular) damage, is determined for a free-cutting steel tested over a range of temperatures and strain rates on a Gleeble thermomechanical simulator. This model has been implemented using the CREEP subroutine of the commercial finite element (FE) solver ABAQUS. Numerical procedures to simulate axisymmetric hot tensile deformation are developed with consideration of the thermal gradient along the axis of the tensile testpiece. FE simulations are carried out to reproduce the necking phenomenon and the evolution of plasticity-induced and grain boundary damage. The simulated results have been validated with experimental tensile test results. The effects of necking and its associated stress state on flow stress and ductility are investigated. The flow stress and ductility data obtained from a Gleeble material simulator under various hot deformation conditions have also been numerically studied.

Hot tensile deformation constitutive equation and processing map of AZ61Ce magnesium alloy sheet

2019 ◽  
Vol 6 (4) ◽  
pp. 046521 ◽  
Author(s):  
Zhenxiong Wei ◽  
Zhongjun Wang ◽  
Jing Zhu ◽  
Weijuan Li ◽  
Hongbin Wang
Keyword(s):  
Magnesium Alloy ◽  
Constitutive Equation ◽  
Processing Map ◽  
Tensile Deformation ◽  
Alloy Sheet ◽  
Magnesium Alloy Sheet ◽  
Hot Tensile Deformation

Quantitative Analysis of Dynamic Softening Behaviors Induced by Dynamic Recrystallization for Ti-10V-2Fe-2Al Alloy

2015 ◽  
Vol 34 (6) ◽  
Author(s):  
Guozheng Quan ◽  
Shiao Pu ◽  
Hairong Wen ◽  
Zhenyu Zou ◽  
Jie Zhou
Keyword(s):  
Titanium Alloy ◽  
Quantitative Analysis ◽  
Dynamic Recrystallization ◽  
Hot Compression ◽  
Laboratory Scale ◽  
Compression Tests ◽  
Temperature Range ◽  
Height Reduction ◽  
Softening Behavior ◽  
Dynamic Softening

AbstractIn 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 (

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