Investigation of Sample-size Influence on Tensile Test Results at Different Strain Rates

Rund, Martin; Procházka, Radek; Konopík, Pavel; Džugan, Ján; Folgar, Hugo

doi:10.1016/j.proeng.2015.08.086

Cited by 43 publications

(22 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…However, as these standards do not consider the testing of miniature bodies, the procedure with the internal regulation has been developed and accredited. Micro -tensile testing has proved to be effective in earlier studies [Dzugan 2017], [Dzugan 2018] and [Rund 2015 andPodany 2014] and the values of mechanical properties are fully comparable with the results of standard tensile tests. The tests were performed on a special LabControl test facility with a capacity of 5kN, accurate measurement of the deformation is provided by the Digital Image Correlation system (DIC).…”

Section: Mechanical Testingmentioning

confidence: 57%

Comparison of the Powder Bed Fused Materials From Different Powder Manufacturers

Koukolíková¹,

Podaný²,

Mertová³

2019

MM SJ

View full text Add to dashboard Cite

Additive manufacturing (AM) has enabled not only designers over the last few years to boost a huge boom in the design and optimization of machine components. Part of the additive manufacturing is not only the design of the component itself, but the individual steps involved in the creation of computer documentation necessary for the preparation of the AM, the selection of suitable material and the printing itself with possible subsequent heat treatment. Process parameters, including the choice of powder, have a significant effect on the resulting component properties. The powder is one of the process features that play a significant role. The main aim of the research is to compare the properties of materials made from different powders manufacturers. A micro-tensile tests (M-TT), reinforced by metallographic and fractographic analysis, were used to analyse the materials, allowing a detailed discussion of the resulting material properties.

show abstract

Section: Mechanical Testingmentioning

confidence: 57%

Comparison of the Powder Bed Fused Materials From Different Powder Manufacturers

Koukolíková¹,

Podaný²,

Mertová³

2019

MM SJ

View full text Add to dashboard Cite

show abstract

“…Standard size samples were cylindrical with diameters ranging from 5 to 10mm. The resulting curves of these tests were almost identical and there can be found excellent agreement for all materials investigated between standard size specimens and M-TTs for a whole range of strength levels from about 250MPa up to 1250MPa [8].…”

Section: Introductionmentioning

confidence: 53%

Application of micro-tensile test for material characterization of mild steel DC01

Konopík

Farahnak

Rund

et al. 2018

View full text Add to dashboard Cite

During recent years, material characterization based on miniature tensile specimens has been investigated extensively. The Small Punch Test (SPT) is often used for determination of tensile properties but alternative miniature tensile specimen geometries have been suggested due to the limitations of the SPT specimen geometry. However, compared to SPT, the Micro-Tensile Test (M-TT) has a significant advantage since it does not need previous established correlations and enables direct results conversion into standard terms. In this paper, the applicability of the M-TT is investigated for material characterization including Lankford coefficients, hardening laws and stress-strain curves. For this purpose, mild steel DC01 M-TT samples were extracted from sheet in Rolling, Transverse and Diagonal Directions. Moreover, M-TT samples were machined to achieve different thicknesses for indicating thickness effects on strain path.

show abstract

“…Hence, miniature test pieces had to be used. For this purpose, the recently-developed micro-tensile test (M-TT) technique for materials with low ductility was chosen [22][23][24].…”

Section: Micro-tensile Test (M-tt)mentioning

confidence: 99%

Effect of the Parameters of Semi-Solid Processing on the Elimination of Sharp-Edged Primary Chromium Carbides from Tool Steel

Jirková

Rubešová

Konopík

et al. 2018

Metals

Self Cite

View full text Add to dashboard Cite

Although conventional tool steels have been heat treated on a routine basis for decades, the search continues for new ways to eliminate their troublesome sharp-edged primary chromium carbides, which impair toughness. One of the available techniques is semi-solid processing, which involves partial melting of the workpiece. The structure after semi-solid processing consisted of a austenite and carbide-austenite network. The network can be broken up and its fragments distributed uniformly by subsequent forming with appropriate parameters. In this experimental study, X210Cr12 tool steel was heated to a semi-solid state, and after cooling to a solid state, worked in a hydraulic press. Suitable soaking temperatures were sought within an interval between 1200 °C and 1280 °C. The workpieces were quenched from the forming temperature in water or oil. In order to improve formability and reduce hardness, tempering was tested as well. Additional experimental regimes included conventional quenching and tempering. Once the appropriate parameters were chosen, the elimination of primary chromium carbides was successful. The resultant microstructures were fine and consisted of M-A constituent with a size of approximately 1 μm, and very fine Fe3C and Cr7C3 carbides. The hardness was in excess of 800 HV10. They were examined using optical and scanning electron microscopes. The carbides were characterized on transparent foils in a transmission electron microscope. Mechanical characteristics were determined in micro-tensile tests.

show abstract

Investigation of Sample-size Influence on Tensile Test Results at Different Strain Rates

Cited by 43 publications

References 2 publications

Comparison of the Powder Bed Fused Materials From Different Powder Manufacturers

Comparison of the Powder Bed Fused Materials From Different Powder Manufacturers

Application of micro-tensile test for material characterization of mild steel DC01

Effect of the Parameters of Semi-Solid Processing on the Elimination of Sharp-Edged Primary Chromium Carbides from Tool Steel

Contact Info

Product

Resources

About