An analysis on necking effect and stress distribution in round cross-section specimens of pure copper with different diameters

Yuan, Wu; Zhou, Feichi; Zhang, Z.L.; Su, Yanjing; Li, Qiao; Chu, W.Y.

doi:10.1016/j.msea.2012.10.077

Cited by 11 publications

(2 citation statements)

References 30 publications

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“…Figure 17. (a) Axial stress in the central necking zone (according to [45] adapted from [49]) and (b) the fracture surface of the L-heated tungsten wire pulled at a speed of 5×10 3 μm/s.…”

Section: Fracture Modesmentioning

confidence: 99%

Microstructure, mechanical behaviour and fracture of pure tungsten wire after different heat treatments

Zhao

Riesch

Höschen

et al. 2017

International Journal of Refractory Metals and Hard Materials

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Plastic deformation of tungsten wire is an effective source of toughening tungsten fibre-reinforced tungsten composites (Wf/W) and other tungsten fibre-reinforced composites. To provide a reference for optimization of those composites, unconstrained pure tungsten wire is studied after various heat treatments in terms of microstructure, mechanical behaviour and fracture mode. Recrystallization is already observed at a relatively low temperature of 1273 K due to the large driving force caused by a high dislocation density. Annealing for 30 minutes at 1900 K also leads to recrystallization, but causes a rather different microstructure. As-fabricated wire and wire recrystallized at 1273 K for 3 hours show fine grains with a high aspect ratio and a substantial plastic deformability: a clearly defined tensile strength, high plastic work, similar necking shape, and the characteristic knife-edge-necking of individual grains on the fracture surface. While the wire recrystallized at 1900 K displays large, almost equiaxed grains with low aspect ratios as well as distinct brittle properties. Therefore, it is suggested that a high aspect ratio of the grains is important for the ductile behaviour of tungsten wire and that embrittlement is caused by the loss of the preferable elongated grain structure rather than by recrystallization. In addition, a detailed evaluation of the plastic deformation behaviour during tensile test gives guidance to the design and optimization of tungsten fibre-reinforced composites.

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Section: Fracture Modesmentioning

confidence: 99%

Microstructure, mechanical behaviour and fracture of pure tungsten wire after different heat treatments

Zhao

Riesch

Höschen

et al. 2017

International Journal of Refractory Metals and Hard Materials

View full text Add to dashboard Cite

show abstract

“…Specimens of non-standard dimensions and shapes, of small cross-sections are generally the RESEARCH dog bone type with rectangular cross-sections. Many researchers are concerned with the influence of the shape and dimensions of the specimens on the results of the testing [12][13][14][15]. Most of the authors verified their results with the finite element method.…”

Section: Introductionmentioning

confidence: 99%

Theory Reviews - Hardware and Software Support for Testing Material on Specimens of the Small Cross Section

Kostic¹,

Košarac²,

Luković³

et al. 2019

Tribol. Ind.

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Testing techniques to obtain the mechanical properties of materials on specimens of the small cross section (miniature specimen) become the subject of numerous researches due to several advantages, in economic and organizational terms. This paper presents the model of the tensile testing device for materials on the specimens of the small cross section, its hardware and software basis. The device proved to be very reliable, so it is suitable for testing the mechanical characteristics of the material, just like the one used for the demonstration of material testing for students.

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Effect of Notch on Strength and Ductility of a Martensitic Stainless Steel in Tensile Test

Singh,

Nath

2023

Lecture Notes in Mechanical Engineering

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An analysis on necking effect and stress distribution in round cross-section specimens of pure copper with different diameters

Cited by 11 publications

References 30 publications

Microstructure, mechanical behaviour and fracture of pure tungsten wire after different heat treatments

Microstructure, mechanical behaviour and fracture of pure tungsten wire after different heat treatments

Theory Reviews - Hardware and Software Support for Testing Material on Specimens of the Small Cross Section

Effect of Notch on Strength and Ductility of a Martensitic Stainless Steel in Tensile Test

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