scholarly journals Microstructure Evolution and Flow Localization Characteristics of 5A06 Alloy in High Strain Rate Forming Process

2014 ◽  
Vol 81 ◽  
pp. 1198-1203 ◽  
Author(s):  
Siliang Yan ◽  
He Yang ◽  
Hongwei Li ◽  
Xuan Yao
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Microstructure Evolution ◽  
High Strain ◽  
Flow Localization ◽  
Forming Process ◽  
High Strain Rate Forming

Warm-Forging Characteristics and Microstructural Response of Medium-Carbon High-Strength Steels for High-Duty Components

2014 ◽  
Vol 611-612 ◽  
pp. 167-172 ◽  
Author(s):  
Piotr Skubisz ◽  
Łukasz Lisiecki
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Microstructure Evolution ◽  
High Strain ◽  
Deformation Behaviour ◽  
Metal Flow ◽  
High Strength Steels ◽  
High Strength ◽  
Medium Carbon ◽  
Warm Forging

Paper presents deformation behaviour and microstructural response of selected medium-carbon high-strength steels commonly used for high-duty components deformed under high-strain-rate and warm work temperature range. The investigation of material behaviour is oriented at analysis of hot and warm workability of material and microstructure evolution resultant from deformation mechanisms, strain induced recrystallization and hardening at temperatures of lower forging regime and high strain rate deformation. The effect of these factors on microstructure after forging and subsequent direct-cooling was studied. Metallographic work aided with numerical methods of simulation of the metal flow and microstructure evolution during forging were used to correlate thermo-mechanical parameters observed with microstructure and mechanical properties after forging and cooling.

scholarly journals New Forming Process of Three-Dimensionally Shaped Magnesium Parts Utilizing High-Strain-Rate Superplasticity

2004 ◽  
Vol 45 (8) ◽  
pp. 2531-2536 ◽  
Author(s):  
Akira Takara ◽  
Yukio Nishikawa ◽  
Hiroyuki Watanabe ◽  
Hidetoshi Somekawa ◽  
Toshiji Mukai ◽  
...  
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
High Strain ◽  
Forming Process

scholarly journals Effect of adiabatic heating on microstructure evolution in Ti-6Al-4V during high strain rate forging

2020 ◽  
Vol 321 ◽  
pp. 12003
Author(s):  
Mykola Kulakov ◽  
Laurie Da Silva ◽  
Aurik Andreu
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Microstructure Evolution ◽  
High Strain ◽  
Volume Fraction ◽  
Adiabatic Heating ◽  
Temperature Fields ◽  
Phase Volume Fraction ◽  
Β Phase ◽  
Deform 2D

The effect of adiabatic heating on microstructure evolution during high strain rate subtransus forging of a Ti-6Al-4V alloy having equiaxed initial microstructure was studied through experiments and modelling. Ø45 × 67.5 mm cylindrical billets with embedded thermocouples were forged at four different α+β temperatures on a Schuler 2100t screw press to evaluate the extent of adiabatic heating in different parts of the billet. In the centre of the billet, the highest temperature increase due to adiabatic heating exceeded the β transus (~1000 °C) during forging. The microstructure of the forged billets was examined for any changes in β phase volume fraction due to adiabatic heating. The forging process was then simulated in Deform 2D/3D software. High strain rate compression testing in the α+β and β temperature fields was carried out using a Phoenix forge simulator to generate input mechanical properties for the model. The effect of the billet size on the α-β phase transformation during forging and post-forge cooling is also discussed.

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