scholarly journals Superplastic deformation behaviour and microstructure evolution of near-α Ti-Al-Mn alloy

2017 ◽  
Vol 708 ◽  
pp. 469-477 ◽  
Author(s):  
A.V. Mikhaylovskaya ◽  
A.O. Mosleh ◽  
A.D. Kotov ◽  
J.S. Kwame ◽  
T. Pourcelot ◽  
...  
Keyword(s):  
Microstructure Evolution ◽  
Superplastic Deformation ◽  
Deformation Behaviour

Research on Temperature Changes and Microstructure Evolution of Steel Target after the Penetration by Copper Jet

2011 ◽  
Vol 311-313 ◽  
pp. 953-956
Author(s):  
Hao Chen ◽  
Gang Tao
Keyword(s):  
Grain Size ◽  
High Temperature ◽  
Temperature Distribution ◽  
Microstructure Evolution ◽  
Deformation Zone ◽  
Superplastic Deformation ◽  
Theoretical Formula ◽  
Temperature Changes ◽  
Normal Deformation ◽  
Steel Target

In order to study dynamic response of metal, this paper makes use of theoretical formula to investigate changes of temperature and grain size on steel target after the penetration of copper jet based on data gathered from the experiments. Deformed target penetrated by copper jet could be divided into superplastic deformation zone and normal deformation zone according to the different microstructure. Temperature distribution of each deformation zones is in turn calculated by two constitutive equations. The results indicate that areas with high temperature concentrate on the narrow zone near the penetrated channel. Then, the calculation of grain size conforms to the observation. It is obviously proven that the method used in this paper is trustworthy for calculating the changes of temperature and grain size of target caused by penetration.

Superplastic deformation behaviour of aluminium containing brasses

2016 ◽  
Vol 674 ◽  
pp. 135-143 ◽  
Author(s):  
O.A. Yakovtseva ◽  
A.V. Mikhaylovskaya ◽  
A.V. Pozdniakov ◽  
A.D. Kotov ◽  
V.K. Portnoy
Keyword(s):  
Superplastic Deformation ◽  
Deformation Behaviour

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.

Superplastic deformation behaviour of friction stir processed 7075Al alloy

2002 ◽  
Vol 50 (17) ◽  
pp. 4419-4430 ◽  
Author(s):  
Z.Y Ma ◽  
R.S Mishra ◽  
M.W Mahoney
Keyword(s):  
Superplastic Deformation ◽  
Deformation Behaviour ◽  
Friction Stir ◽  
7075Al Alloy

Effect of the Strain and Strain Rate on Microstructure Evolution and Superplastic Deformation Mechanisms

2019 ◽  
Vol 120 (1) ◽  
pp. 87-94 ◽  
Author(s):  
O. A. Yakovtseva ◽  
A. V. Mikhaylovskaya ◽  
A. D. Kotov ◽  
O. I. Mamzurina ◽  
V. K. Portnoy
Keyword(s):  
Strain Rate ◽  
Microstructure Evolution ◽  
Superplastic Deformation ◽  
Deformation Mechanisms ◽  
Strain And Strain Rate

Strain Path Change Effect on Deformation Behaviour of Materials with Low-to-Moderate Stacking Fault Energy

2008 ◽  
Vol 587-588 ◽  
pp. 420-424 ◽  
Author(s):  
Nataliya A. Sakharova ◽  
Milena M. Vieira ◽  
José Valdemar Fernandes ◽  
Manuel F. Vieira
Keyword(s):  
Shear Modulus ◽  
Microstructure Evolution ◽  
Deformation Behaviour ◽  
True Strain ◽  
Stacking Fault ◽  
Metals And Alloys ◽  
Stacking Fault Energy ◽  
Dislocation Slip ◽  
Strain Paths ◽  
Complex Strain

Stacking fault energy (SFE) plays an important role in face centred cubic (f.c.c.) metals and alloys in determining the prevailing mechanisms of plastic deformation. Low SFE metals and alloys have a tendency to develop mechanical twinning, besides dislocation slip, during plastic deformations. Deformation behaviour and microstructure evolution under simple and complex strain paths were studied in 70/30 brass, with small and intermediate grain sizes, which corresponds to a f.c.c. material with low SFE. Simple (rolling and tension) and complex (tension normal to previous rolling) strain paths were performed. The macroscopic deformation behaviour of materials studied is discussed in terms of equivalent true stress vs. equivalent true strain responses and strain hardening rates normalized by shear modulus (dσ/dε)/G as vs. (σ – σ0)/G (σ0 is the initial yield stress of the material and G is the shear modulus). The mechanical behaviour is discussed with respect to dislocation and twin microstructure evolution developed in both, simple and complex strain paths.

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