Enhanced strength–ductility synergy in nanostructured Cu and Cu–Al alloys processed by high-pressure torsion and subsequent annealing

2012 ◽  
Vol 66 (5) ◽  
pp. 227-230 ◽  
Author(s):  
X.H. An ◽  
S.D. Wu ◽  
Z.F. Zhang ◽  
R.B. Figueiredo ◽  
N. Gao ◽  
...  
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Al Alloys ◽  
Subsequent Annealing

Enhancing tensile properties of Cu and Cu-Al alloys cryogenically processed by high pressure torsion

2019 ◽  
Vol 771 ◽  
pp. 317-321 ◽  
Author(s):  
Kun Xia Wei ◽  
J. Horky ◽  
Wei Wei ◽  
M.J. Zehetbauer ◽  
D. Setman ◽  
...  
Keyword(s):  
High Pressure ◽  
Tensile Properties ◽  
High Pressure Torsion ◽  
Al Alloys

Effect of composition, annealing temperature, and high pressure torsion on structure and hardness of Ti–V and Ti–V–Al alloys

2019 ◽  
Vol 125 (8) ◽  
pp. 082522 ◽  
Author(s):  
Alena S. Gornakova ◽  
Alexandr B. Straumal ◽  
Igor I. Khodos ◽  
Ivan B. Gnesin ◽  
Andrey A. Mazilkin ◽  
...  
Keyword(s):  
High Pressure ◽  
Annealing Temperature ◽  
High Pressure Torsion ◽  
Al Alloys

Structure and Mechanical Behavior of Al–Nb Hybrids Obtained by High‐Pressure‐Torsion‐Induced Diffusion Bonding and Subsequent Annealing

2020 ◽  
pp. 2000757
Author(s):  
Galiia Korznikova ◽  
Elena Korznikova ◽  
Konstantin Nazarov ◽  
Ruslan Shayakhmetov ◽  
Rinat Khisamov ◽  
...  
Keyword(s):  
High Pressure ◽  
Mechanical Behavior ◽  
Diffusion Bonding ◽  
High Pressure Torsion ◽  
Subsequent Annealing

Thermo- and Deformation Induced Martensitic Transformations in Binary TiNi-Based Alloys Subjected to Severe Plastic Deformation

2013 ◽  
Vol 738-739 ◽  
pp. 530-534 ◽  
Author(s):  
Natalia N. Kuranova ◽  
Vladimir V. Makarov ◽  
Vladimir G. Pushin ◽  
Alexey N. Uksusnikov
Keyword(s):  
Plastic Deformation ◽  
Grain Size ◽  
High Pressure ◽  
Severe Plastic Deformation ◽  
High Pressure Torsion ◽  
Amorphous State ◽  
Cold Drawing ◽  
Martensitic Transformations ◽  
Subsequent Annealing ◽  
Structure And Phase Transformations

Results of investigations of structure and phase transformations and properties of the TiNi-based alloys with a shape memory effect (SME) after severe plastic deformation (SPD) by cold rolling, cold drawing, high pressure torsion and subsequent annealing are reported. It is found that the baroelastic effects related to the highly reversible martensitic transformations can occur in alloys, subjected to high pressure. The evolution of fine structure of the alloys into nanocrystalline and then amorphous state during SPD and after subsequent annealing have been studied. The effect of grain size on the martensitic transformations and properties of the alloys is discussed.

Severe Plastic Deformation under High Pressure for Production of Superplastic Materials

2016 ◽  
Vol 838-839 ◽  
pp. 287-293 ◽  
Author(s):  
Zenji Horita
Keyword(s):  
Plastic Deformation ◽  
Grain Size ◽  
High Pressure ◽  
Severe Plastic Deformation ◽  
Grain Refinement ◽  
High Pressure Torsion ◽  
High Strength ◽  
Al Alloys ◽  
Strain Rates ◽  
Ti Alloys

Grain refinement is an important prerequisite for advent of superplasticity. In particular, as the grain size is smaller, the superplasticity appears at higher strain rates and lower temperatures. Severe plastic deformation (SPD) is a useful process for achieving significant grain refinement. This presentation shows that applicability of the SPD process is enhanced when it is operated under high pressure through high-pressure torsion (HPT) and high-pressure sliding (HPS). It is demonstrated that commercially available conventional alloys but less ductile alloys such as Mg alloys, age-hardenable high-strength Al alloys (A2024, A7075) and Ti alloys become superplastic after processing by HPT or HPS.

Recrystallization Processes in a Ni-20%Cr Alloy Subjected to High-Pressure Torsion

2012 ◽  
Vol 715-716 ◽  
pp. 309-314
Author(s):  
Nadezhda Dudova ◽  
Andrey Belyakov ◽  
Rustam Kaibyshev
Keyword(s):  
High Pressure ◽  
High Pressure Torsion ◽  
Subsequent Annealing ◽  
Simultaneous Occurrence ◽  
Annealing Conditions ◽  
Short Range Ordering ◽  
Average Grain Size ◽  
High Microhardness ◽  
Uniform Manner ◽  
Average Size

Microstructure evolution during annealing of a Ni-20%Cr alloy subjected to high-pressure torsion (HPT) at ambient temperature was examined. It was shown that discontinuous static recrystallization (DSRX) occurs in non-uniform manner under subsequent annealing in the alloy strained to ε<4. The material strained to ε6 or higher exhibits continuous grain growth (GG) under subsequent annealing. It is attributed to the fact that HPT led to the formation of nanoscale grains with an average size of 50 nm. Increasing fraction of these grains with strain leads to transition from DSRX to continuous GG under subsequent annealing. It was found that the main feature of recrystallization behavior of the Ni-20%Cr alloy subjected to HPT is simultaneous occurrence of short-range ordering and recrystallization processes under annealing conditions. As a result, despite the formation of recrystallized structure with an average grain size of 340 nm after annealing at 600°C (0.52 Tm), the material exhibits very high microhardness of 3.6 GPa.

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