Modelling of the microstructure and properties in the length scales varying from nano- to macroscopic

Kurzydłowski, Krzysztof J.

doi:10.2478/v10175-010-0021-7

Cited by 5 publications

(5 citation statements)

References 27 publications

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“…The most popular SPD techniques were equal channel angular pressing (ECAP) and high pressure torsion (HPT). However, it has been shown recently that hydrostatic extrusion (HE) is an efficient method of achieving grain refinement to the nanoscale [3][4][5]. The efficiency of HE has been confirmed for a variety of materials, including aluminum alloys and titanium.…”

Section: Introductionmentioning

confidence: 99%

Nanostructure Formation in Austenitic Stainless Steel

Krawczyńska

Lewandowska

Kurzydłowski

2008

SSP

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Samples of 316LVM stainless steels were hydrostatically extruded in a multi-step process to a total true strain of 1,84 and subsequently annealed at different temperatures. The structural changes occurring as a result of HE and annealing were observed using a transmission electron microscope. The microhardness of the samples was measured using a load of 200g. The results show that hydrostatic extrusion results in a uniform microstructure characterized by a high density of nano-twins. Subsequent annealing at 600°C produces a partial transformation to a nano structure of average grain size 54 nm. At an annealing temperature of 700°C a fullyrecrystallized uniform microstructure consisting of 68 nm diameter nano-grains was formed. It should be noted that 700°C is much lower than that required to recrystallize a micro-grained alloy of the same composition. The microstructural changes which occurred during annealing have a significant effect on the mechanical properties. The microhardness after HE increased following annealing at 500°C. However, annealing at 800°C resulted in a drop in microhardness, indicating the occurrence of grain growth.

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Section: Introductionmentioning

confidence: 99%

Nanostructure Formation in Austenitic Stainless Steel

Krawczyńska

Lewandowska

Kurzydłowski

2008

SSP

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“…Various experimental techniques have been developed to study materials (also including nanomaterials [1]) at high-strain-rate loading conditions. The split Hopkinson pressure bar method is the most common [2][3], however, this technique has some limitations, so many other experimental methods were used to examine the dynamic behaviour of materials.…”

Section: Introductionmentioning

confidence: 99%

Measurement Procedure of Ring Motion with the Use of Highspeed Camera During Electromagnetic Expansion

Janiszewski¹

2012

Metrology and Measurement Systems

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An optical measurement method of radial displacement of a ring sample during its expansion with velocity of the order 172 m/s and estimation technique of plastic flow stress of a ring material on basis of the obtained experimental data are presented in the work. To measure the ring motion during the expansion process, the Phantom v12 digital high-speed camera was applied, whereas the specialized TEMA Automotive software was used to analyze the obtained movies. Application of the above-mentioned tools and the developed measuring procedure of the ring motion recording allowed to obtain reliable experimental data and calculation results of plastic flow stress of a copper ring with satisfactory accuracy.

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“…Promising modifications for production of ultra fine-grained massive semi-products in industrial practice have appeared [3][4][5][6]. The ECAP method makes it possible to obtain the grain size of several hundreds of nanometres [6][7][8]. Materials with sub-micron size of sub-grains/grains (d=0.1-1 µm) are usually classified as ultra fine-grained materials [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Severe Plastic Deformation on Structure and Properties of Beta Titanium Alloy Using for Hip Implants

Kander

Greger

2017

MSF

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The Paper Deals with Microstructural and Mechanical Properties Changes during Severe Plastic Deformation Process in Beta Titanium Alloy Used for Hip Implants. Effect of Various Numbers of Passes through ECAP (Equal Chanel Angular Pressing) Die on Microstructure and Properties Have been Evaluated. Comparison between Virgin State Cast Alloy and Alloy after Several Steps of Severe Plastic Deformation Induced by ECAP Technology Have been Carried out. Mechanical Properties Have been Evaluated Using Miniaturized Specimens. from Experimental Work can Be Concluded Positive Effect of ECAP Technology both on Mechanical Properties (yield Stress as well as Tensile Strength) Including Grain Size.

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Modelling of the microstructure and properties in the length scales varying from nano- to macroscopic

Cited by 5 publications

References 27 publications

Nanostructure Formation in Austenitic Stainless Steel

Nanostructure Formation in Austenitic Stainless Steel

Measurement Procedure of Ring Motion with the Use of Highspeed Camera During Electromagnetic Expansion

Effect of Severe Plastic Deformation on Structure and Properties of Beta Titanium Alloy Using for Hip Implants

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