Deformation Homogeneity of Extruded AA7075 Alloy During Subsequent ECAP

2020 ◽  
Vol 9 (2) ◽  
pp. 1-5
Author(s):  
Mehdi Shaban Ghazani
Keyword(s):  
Deformation Homogeneity

scholarly journals Electromagnetic Force Distribution and Deformation Homogeneity of Electromagnetic Tube Expansion With a New Concave Coil Structure

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 117107-117114 ◽  
Author(s):  
Li Qiu ◽  
Yantao Li ◽  
Yijie Yu ◽  
A. Abu-Siada ◽  
Qi Xiong ◽  
...  
Keyword(s):  
Electromagnetic Force ◽  
Force Distribution ◽  
Coil Structure ◽  
Tube Expansion ◽  
Deformation Homogeneity

Effect of Deformation Homogeneity on Grain Refinement of AZ31 Magnesium Alloys Based on FEA during ECAP

2016 ◽  
Vol 850 ◽  
pp. 281-286
Author(s):  
Yi Wen Xia ◽  
Bi You Peng ◽  
Chao Zhou ◽  
Ren Yuan Pan ◽  
Shi Xiong Chen
Keyword(s):  
Finite Element ◽  
Magnesium Alloy ◽  
Grain Refinement ◽  
Az31 Magnesium Alloy ◽  
Effect Of Temperature ◽  
Angular Pressing ◽  
Element Simulation ◽  
Simulation Results ◽  
Deformation Homogeneity ◽  
Deform 3D

In this study, the deformation process of AZ31 magnesium alloy during equal channel angular pressing (ECAP) was simulated using the commercial software Deform-3D under different extrusion condition (passes and temperatures). To investigate the effect of temperature and deformation rate on grain refinement, the rules of flow and deformation homogeneity and also the extrusion load during ECAP was discussed. The simulation results indicate that the AZ31 magnesium alloy obtain homogenous and larger strain magnitude after 4 passes ECAP at 250°C~275°C. To verify the 3D finite element simulation results, the microstructure in the cross-section was observed. It shows that the grain of AZ31 magnesium alloy is homogenous refined by finite element method (FEM) results, thus the mechanical property is improved.

Graded Transitions Homogeneity for Ti-50.8%Ni Processed by ECAP

2014 ◽  
Vol 1082 ◽  
pp. 90-94
Author(s):  
Mohamed Osman ◽  
Dian Tao Zhang ◽  
Yun Xiang Tong ◽  
Yu Feng Zheng ◽  
Li Li
Keyword(s):  
Standard Deviation ◽  
Shape Memory Alloy ◽  
Vickers Microhardness ◽  
Angular Pressing ◽  
Simulation Results ◽  
3D Software ◽  
Deformation Homogeneity ◽  
Deform 3D ◽  
Inhomogeneity Index ◽  
Good Agreement

Ti-50.8%Ni shape memory alloy was subjected to four passes equal channel angular pressing (ECAP) with angle 120◦ via route Bc at 450°C. The deformation homogeneity was analyzed on planes across the thickness of the deformed sample by Deform-3D software. Two methods were used from the simulation model to quantify deformation homogeneity , including strain standard deviation (SSD) and inhomogeneity index (Ci). In addition, The deformation heterogeneity of ECAP was analyzed experimentally from microhardness inhomogeneity index ( HII) based on Vickers microhardness test results.In the present work, Ci and SSD had been testified to detect which one could give better results experimentally. It was demonstrated that the simulation results of SSD measurements were in good agreement with experimental results .

Hydrostatic Extrusion as a Method of Grain Refinement in Metallic Materials

2006 ◽  
Vol 503-504 ◽  
pp. 341-348 ◽  
Author(s):  
Krzysztof Jan Kurzydlowski
Keyword(s):  
Aluminium Alloy ◽  
Grain Refinement ◽  
Cross Sections ◽  
High Strain ◽  
Large Strain ◽  
Hydrostatic Extrusion ◽  
Strain Rates ◽  
Metallic Materials ◽  
Deformation Homogeneity ◽  
Very High

The paper describes hydrostatic extrusion (HE) as a method of grain refinement of metallic materials down to the nanometric scale. The main features of this method are: (a) large strain, (b) very high strain rates (even greater than 104 s-1), and (c) deformation homogeneity. HE offers also the opportunity of obtaining bulk materials in a variety of forms (rods and wires of complex cross-sections, small tubes). The study undertaken on 4 materials (aluminium, aluminium alloy, copper and titanium) has shown that significant grain refinement , down to nanometric scale in the case of titanium and aluminium alloy, occurred during HE processing. This grain refinement produces significantly improved mechanical properties. It has been found that HE offers good prospects for the production of nano-structured metals and alloys.

Sign in / Sign up

Export Citation Format

Share Document