Journal ArticleDOI
Effect of cryo-rolling and annealing on microstructure and properties of commercially pure aluminium
TLDR
In this paper, the influence of cryo-rolling reduction and annealing of commercially pure (CP) Al is evaluated in four aspects: microstructure, mechanical properties, electrical conductivity and general corrosion.Abstract:
Influence of cryo-rolling reduction and annealing of commercially pure (CP) Al is evaluated in four aspects: microstructure, mechanical properties, electrical conductivity and general corrosion. It is shown that by selecting optimal cryo-rolling reduction and subsequent annealing condition result in ultrafine grains in CP Al with good combination of high strength and ductility. Electrical conductivity of the cryo-rolled samples decreased due to increased number of the electron scattering centers (lattice defects and grain boundary area). However, optimization of cryo-rolling and annealing treatment could restore the conductivity coupled with high strength in CP Al. Corrosion behaviour of cryo-rolled CP Al improved after annealing treatment. High dissolution rate and low thermal stability of the ultrafine grain structure could override the anticipated advantage of uniform corrosion in ultrafine grain CP Al.read more
Citations
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Extreme grain refinement by severe plastic deformation: A wealth of challenging science
Yuri Estrin,Alexei Vinogradov +1 more
TL;DR: A brief overview of the available SPD technologies is given in this paper, along with a summary of unusual mechanical, physical and other properties achievable by SPD processing, as well as the challenges this research is facing, some of them generic and some specific to the nanoSPD area.
Journal ArticleDOI
Cryogenic strength improvement by utilizing room-temperature deformation twinning in a partially recrystallized VCrMnFeCoNi high-entropy alloy
Yong Hee Jo,Sung Young Jung,Won-Mi Choi,Seok Su Sohn,Hyoung Seop Kim,Byeong-Joo Lee,Nack J. Kim,Sunghak Lee +7 more
TL;DR: The results demonstrate that non-recrystallized grains, which are generally avoided in conventional alloys because of their deleterious effect on ductility, can be useful in achieving high-strength high-entropy alloys.
Journal ArticleDOI
Development of ultrafine grained high strength Al-Cu alloy by cryorolling
TL;DR: In this article, the microstructure and mechanical properties of a precipitation hardening Al-Cu (2219) alloy subjected to cryorolling, low temperature annealing and ageing treatments are reported.
Journal ArticleDOI
Role of stacking fault energy in strengthening due to cryo-deformation of FCC metals
V. Subramanya Sarma,V. Subramanya Sarma,Jun Wang,Jun Wang,W. W. Jian,Alexander Kauffmann,Hans Conrad,J. Freudenberger,Yuntian Zhu +8 more
TL;DR: In this article, the effectiveness of the cryogenic rolling vis-a-vis room temperature (RT) rolling on strengthening is significantly affected by stacking fault energy (SFE) and there is an optimum SFE at which CT rolling is most effective.
Journal ArticleDOI
A study on the mechanical properties of cryorolled Al–Mg–Si alloy
TL;DR: In this article, the mechanical properties of a precipitation hardenable Al-Mg-Si alloy subjected to cryorolling and ageing treatments are reported in a solid solutionised state.
References
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Book
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TL;DR: In this paper, the International System of Units (SI) is used to measure the properties of materials and their properties in the context of materials science and engineering, including properties of metal alloys.
Journal ArticleDOI
Bulk nanostructured materials from severe plastic deformation
TL;DR: In this article, the authors present methods of severe plastic deformation and formation of nanostructures, including Torsion straining under high pressure, ECA pressing, and multiple forging.
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High tensile ductility in a nanostructured metal.
TL;DR: A thermomechanical treatment of Cu is described that results in a bimodal grain size distribution, with micrometre-sized grains embedded inside a matrix of nanocrystalline and ultrafine (<300 nm) grains, which impart high strength, as expected from an extrapolation of the Hall–Petch relationship.
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Novel ultra-high straining process for bulk materials—development of the accumulative roll-bonding (ARB) process
TL;DR: In this paper, the accumulative roll-bonding (ARB) method was proposed to introduce high plastic strain without any geometrical change if the reduction in thickness is maintained to 50% every rolling pass.
Journal ArticleDOI
Strength and ductility of ultrafine grained aluminum and iron produced by ARB and annealing
TL;DR: In this article, the strength and ductility of UFG aluminum and iron fabricated by ARB and annealing were clarified in the grain sizes ranging from 200 nm to 20 μm.