The effect of crystallographic grain orientation of polycrystalline Ti on ploughing under scratch testing

Шугуров, А. Р.; Панин, А. В.; Дмитриев, А. И.; Nikonov, A. Yu.

doi:10.1016/j.wear.2018.05.013

Cited by 47 publications

(12 citation statements)

References 21 publications

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“…In this study, variation in friction coefficient and transfer layer formation with surface texture has been reported. In another study, effect of crystallographic orientation on the polycrystalline titanium on the ploughing under scratch test has been reported [11]. From the literature survey, it is intuitive that only few studies have been done on the effect of crystallographic orientation on the tribological properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of grain orientation on friction and wear behavior of AZ91 magnesium alloy

Kumar

2021

Lett. Mater.

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Because of the light weight of magnesium, it has got potential applications in automobile industry. But magnesium has many limitations and due to that it cannot be used directly as a replacement of aluminium and steel. In past, different alloys of magnesium have been developed to overcome the limitations of magnesium without losing other physical and mechanical properties. One of the most important magnesium alloys is AZ91, which gives better properties than magnesium. In the present investigation, commercially available rectangular block of as cast AZ91 magnesium alloy of size 10 ×10 ×10 mm 3 was heat treated at 390°C for 48 h in air and then water quenched to dissolve all the precipitates into matrix. Electron back scattered diffraction (EBSD) analysis of heat-treated sample was done on a field emission scanning electron microscope to know the crystallographic orientations of the individual grains present in the heat treated AZ91 magnesium alloy. Hardness and scratch resistance for the three different crystallographic orientations such as basal, prismatic and pyramidal orientations of AZ91 magnesium alloy grains was measured using an universal nanomechanical tester having Berkovich diamond indenter. Hardness and scratch resistance are found to vary with the variation in crystallographic orientations of the grains. Further wear resistance of these three different grains having basal, prismatic and pyramidal orientations, respectively were measured by atomic force microscopy and correlated with their measured hardness value.

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Section: Introductionmentioning

confidence: 99%

Effect of grain orientation on friction and wear behavior of AZ91 magnesium alloy

Kumar

2021

Lett. Mater.

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“…It should be noted that single crystals are most often considered independent objects. These studies are concerned with the investigation of the characteristic features of plastic deformation depending on the crystallographic orientation of a single crystal in relation to the loading direction [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Numerical Study and Experimental Validation of Deformation of <111> FCC CuAl Single Crystal Obtained by Additive Manufacturing

Nikonov

Дмитриев

Лычагин

et al. 2021

Metals

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The importance of taking into account directional solidification of grains formed during 3D printing is determined by a substantial influence of their crystallographic orientation on the mechanical properties of a loaded material. This issue is studied in the present study using molecular dynamics simulations. The compression of an FCC single crystal of aluminum bronze was performed along the <111> axis. A Ni single crystal, which is characterized by higher stacking fault energy (SFE) than aluminum bronze, was also considered. It was found that the first dislocations started to move earlier in the material with lower SFE, in which the slip of two Shockley partials was observed. In the case of the material with higher SFE, the slip of a full dislocation occurred via successive splitting of its segments into partial dislocations. Regardless of the SFE value, the deformation was primarily occurred by means of the formation of dislocation complexes involved stair-rod dislocations and partial dislocations on adjacent slip planes. Hardening and softening segments of the calculated stress–strain curve were shown to correspond to the periods of hindering of dislocations at dislocation pileups and dislocation movement between them. The simulation results well agree with the experimental findings.

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“…Scratch testing is a promising technique for gaining insight into the mechanisms underlying plastic ploughing and the elastic recovery of metals. This technique makes it possible to study the deformation of multiphase materials, taking into account local features of their microstructure, i.e., to investigate the deformation of grains with different crystallographic orientations [13,14], to demonstrate the effects of internal interfaces [15,16], individual phases and inclusions [14,17] on deformation behavior, as well as to reveal the development of deformation phase transformations in the materials [18,19]. In addition to the experimental studies, molecular dynamics (MD) simulation is widely used for the investigation of nucleation and the development of plastic deformation in materials subjected to scratch testing.…”

Section: Introductionmentioning

confidence: 99%

Recovery of Scratch Grooves in Ti-6Al-4V Alloy Caused by Reversible Phase Transformations

Шугуров

Панин

Дмитриев

et al. 2020

Metals

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The deformation behaviors of Ti-6Al-4V alloy samples with lamellar and bimodal microstructures under scratch testing were studied experimentally and using molecular dynamics simulation. It was found that the scratch depth in the sample with a bimodal microstructure was twice as shallow as that measured in the sample with a lamellar microstructure. This effect is attributed to the higher hardness of the sample with a bimodal microstructure and the larger amount of elastic recovery of scratch grooves in this sample. On the basis of the results of molecular dynamics simulation, a mechanism was proposed, which associates the recovery of the scratch grooves with the inhomogeneous vanadium distribution in the β-areas. The calculations showed that at a vanadium content typical for Ti-6Al-4V alloy, both the body-centered cubic (BCC) and hexagonal close-packed (HCP) structures can be more energetically favorable depending on the atomic volume. Therefore, compressive or tensile stresses induced by the indenter could facilitate β→α and α→β phase transformations, respectively, in the vanadium-depleted domains of the β-areas, which contribute to the recovery of the Ti-6Al-4V alloy subjected to scratching.

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The effect of crystallographic grain orientation of polycrystalline Ti on ploughing under scratch testing

Cited by 47 publications

References 21 publications

Effect of grain orientation on friction and wear behavior of AZ91 magnesium alloy

Effect of grain orientation on friction and wear behavior of AZ91 magnesium alloy

Numerical Study and Experimental Validation of Deformation of <111> FCC CuAl Single Crystal Obtained by Additive Manufacturing

Recovery of Scratch Grooves in Ti-6Al-4V Alloy Caused by Reversible Phase Transformations

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