Results 241 to 250 of about 200,245 (303)

Severe Plastic Deformation of Steels

BHM Berg- und Hüttenmännische Monatshefte, 2008
In order to demonstrate the structural changes in steels during severe plastic deformation (SPD), Armco iron, a ferritic steel P800 and a pearlitic rail steel S900A are subjected to a high pressure torsion (HPT) deformation process. The microstructural evolution, the changes in microhardness and the flow stress behaviour are investigated.
S. Scheriau, R. Pippan
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Severe Plastic Deformation - A Review

Materials Today: Proceedings, 2018
Abstract Severe plastic deformation is one of the methods widely used for producing a fine-grained structure throughout the volume. Different SPD methods have been used for producing a fine-grained and ultra-fine grained structure which effectively alters the microstructure and in turn improve the properties.
R.N. Harsha, V. Mithun Kulkarni, B. Satish Babu   +2 more
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Dynamic recrystallization mechanism and improved mechanical properties of a near α high temperature titanium alloy processed by severe plastic deformation

Materials Characterization, 2020
The effect of deformation temperature on microstructure evolution and mechanical properties of a near α titanium alloy during isothermal multiple die forging (IMDF) is systematically investigated. Present study describes the grain refinement mechanism at
Yonggang Sun, C. Zhang, H. Feng, Shu-zhi Zhang, Jian-Chao Han, Wanggang Zhang, E. Zhao, Hongwei Wang   +7 more
semanticscholar   +1 more source

Half-Heusler alloys: Enhancement of ZT after severe plastic deformation (ultra-low thermal conductivity)

, 2020
Several n- and p-type Half-Heusler (HH) thermoelectric materials (Ti0.5Zr0.5NiSn-based and NbFeSb-based) have been processed by high-pressure torsion (HPT) to improve their thermoelectric performance via a drastic reduction towards ultra-low thermal ...
G. Rogl, Sanyukta Ghosh, Lei Wang, J. Buršík, A. Grytsiv, M. Kerber, E. Bauer, R. Mallik, Xing-Qiu Chen, M. Zehetbauer, P. Rogl   +10 more
semanticscholar   +1 more source

The role of pyramidal 〈  +  〉 dislocations in the grain refinement mechanism in Ti-6Al-4V alloy processed by severe plastic deformation

, 2020
This study focuses on the role of pyramidal 〈c + a〉 dislocations in the grain refinement mechanism in the Ti-6Al-4V alloy with an initial { 11 2 ¯ 0 } 10 1 ¯ 0 > rolling texture.
Chenglin Wang, Dapeng Yu, Zhiqiang Niu, Wenlong Zhou, Guoqing Chen, Zhi-qiang Li, Xuesong Fu   +6 more
semanticscholar   +1 more source

Severe Plastic Deformation of Amorphous Alloys

Materials Science Forum, 2008
The structure and mechanical properties of amorphous alloy Ni44Fe29Co15Si2B10 after severe plastic deformation (SPD) in Bridgman chamber at the different temperatures (77 and 298 K) have been studied. It is shown that the early stages of the SPD of amorphous alloy cause a noticeable decrease in microhardness HV and significant changes in the physical ...
Alex M. Glezer, Sergey V. Dobatkin, Margarita R. Plotnikova, Anna V. Shalimova   +3 more
openaire   +1 more source

Fracture of severely plastically deformed titanium

Materials Letters, 2022
Abstract The mechanical properties with emphasis on the fracture behaviour of ultrafine-grained Ti processed by high pressure torsion were evaluated. Through this process a substantial refinement of the microstructure was induced. As a consequence, a pronounced increase of tensile strength was achieved compared to conventional Ti while the ductility ...
B. Völker, S. Wurster, R. Pippan, A. Hohenwarter   +3 more
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On the grain size dependent working hardening behaviors of severe plastic deformation processed metals

, 2020
Based on our analysis, the grain size effect in the most widely used models such as the Kocks–Mecking–Estrin (KME) model cannot account for the work hardening behaviors of nano-crystalline or ultrafine-crystalline metals processed by severe plastic ...
Peng Wang, Tenghao Yin, S. Qu
semanticscholar   +1 more source

Dynamic high pressure torsion: A novel technique for dynamic severe plastic deformation

, 2020
Severe plastic deformation (SPD) processing of polycrystalline metals is often used to obtain ultra-fine grained and nano-crystalline microstructures.
P. Verleysen, H. Lanjewar
semanticscholar   +1 more source

Paradoxes of Severe Plastic Deformation

Advanced Engineering Materials, 2003
AbstractSevere plastic deformation (SPD) can lead to emergence of microstructural features and properties in materials which are fundamentally different from the ones well known for conventional cold deformation. In particular, the instances of unusual phase transformations resulting in development of highly metastable states associated with formation ...
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