Understanding the surface generation mechanism during micro-scratching of Ti-6Al-4V

Pratap, Ashwani; Divse, Vishwas; Goel, Saurav; Joshi, S. K.

doi:10.1016/j.jmapro.2022.08.014

Cited by 9 publications

(5 citation statements)

References 38 publications

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“…Fan and colleagues studied the plastic mechanisms of dislocations during the scratch test [55]. The effect of scratching modes with a single grain of titanium alloy Ti-6Al-4V on the indenter penetration depth and pile-up height was studied by Pratap et al [56]. Thus, the scratch test can be successfully applied to evaluate the effect of material machining processes on the mechanical characteristics of the subsurface layers subjected to a thermo-mechanical impact during processing.…”

Section: Methods For the Determination Of Machined Layers Mechanical ...mentioning

confidence: 99%

Mechanical Characteristics Generation in the Workpiece Subsurface Layers through Cutting

Storchak

2023

Crystals

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The cutting process generates specific mechanical characteristics in the subsurface layers of the shaped parts. These characteristics have a decisive influence on the working properties and product durability of these parts. The orthogonal cutting process of structural heat-treated steel’s effect on the mechanical properties of the machined subsurface layers was evaluated by instrumented the nanoindentation method and sclerometry (scratch) method. As a result of this study, the relationship between the specific work in the tertiary cutting zone and the total deformation work during indenter penetration during the instrumented nanoindentation was established. The dependence of the indenter penetration depth during sclerometry of the machined subsurface layers of the workpiece was also studied. The orthogonal cutting process was carried out at different cutting speeds and tool rake angles. The cutting speed increase and the increase in the tool rake angle cause an increase in the indenter penetration work during the instrumented nanoindentation and an increase in the maximum indenter penetration depth during sclerometry. Simultaneously, the measured microhardness of the machined surfaces decreases with both an increase in cutting speed and an increase in the tool rake angle.

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Section: Methods For the Determination Of Machined Layers Mechanical ...mentioning

confidence: 99%

Mechanical Characteristics Generation in the Workpiece Subsurface Layers through Cutting

Storchak

2023

Crystals

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“…Due to the inhomogeneity of the microstructure and the incompatibility of the deformation of the two phases, the boundary regions of the α grains in the organization of the two-phase titanium alloys and the α/β interfaces in the basketweave microstructure are considered to be relatively fragile because internal cracks in the material tend to sprout and expand in these regions (Zuo et al, 2008). Due to the low thermal conductivity and mechanical properties of titanium alloys, Ti-6Al-4V performs differently during machining, especially when using a round-edged tool for micro-scale machining (Pratap et al, 2022). Zhao and Liu (2020) observed the plastic flow on the machined surface during the ultrasonic assisted roll polishing of Ti-6Al-4V.…”

Section: Materials Properties Of Additive Titanium Alloymentioning

confidence: 99%

The robot grinding and polishing of additive aviation titanium alloy blades: a review

Xiao,

Zhang,

et al. 2024

JIMSE

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PurposeThe purpose of this review is to comprehensively consider the material properties and processing of additive titanium alloy and provide a new perspective for the robotic grinding and polishing of additive titanium alloy blades to ensure the surface integrity and machining accuracy of the blades.Design/methodology/approachAt present, robot grinding and polishing are mainstream processing methods in blade automatic processing. This review systematically summarizes the processing characteristics and processing methods of additive manufacturing (AM) titanium alloy blades. On the one hand, the unique manufacturing process and thermal effect of AM have created the unique processing characteristics of additive titanium alloy blades. On the other hand, the robot grinding and polishing process needs to incorporate the material removal model into the traditional processing flow according to the processing characteristics of the additive titanium alloy.FindingsRobot belt grinding can solve the processing problem of additive titanium alloy blades. The complex surface of the blade generates a robot grinding trajectory through trajectory planning. The trajectory planning of the robot profoundly affects the machining accuracy and surface quality of the blade. Subsequent research is needed to solve the problems of high machining accuracy of blade profiles, complex surface material removal models and uneven distribution of blade machining allowance. In the process parameters of the robot, the grinding parameters, trajectory planning and error compensation affect the surface quality of the blade through the material removal method, grinding force and grinding temperature. The machining accuracy of the blade surface is affected by robot vibration and stiffness.Originality/valueThis review systematically summarizes the processing characteristics and processing methods of aviation titanium alloy blades manufactured by AM. Combined with the material properties of additive titanium alloy, it provides a new idea for robot grinding and polishing of aviation titanium alloy blades manufactured by AM.

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“…The development of the instrumented nanoindentation method was mainly aimed at determining the microhardness of subsurface layers (see, e.g., [67][68][69]), the deformation degree of variously formed parts (see, e.g., [50,58,70]), the microstructure of materials (see, e.g., [71][72][73]), and the residual stresses in the subsurface layers of specimens generated by their previous formation (see, e.g., [74][75][76]). The determination of the material mechanical properties using the sclerometry method was also used somewhat later to investigate the microstructure and hardening of materials by estimating the indenter penetration depth into the test material (see, e.g., [77][78][79]). Recently, the tool indentation method and the sclerometry method have been used not only to determine the above-mentioned individual mechanical characteristics of the parts' subsurface layers subjected to various machining processes but also to evaluate the integral (energy) mechanical characteristics [17,80].…”

Section: Brief Description Of the State Of The Art On The Determinati...mentioning

confidence: 99%

Generation of Mechanical Characteristics in Workpiece Subsurface Layers through Milling

Storchak,

Hlembotska,

Melnyk

2024

Materials

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The generation of mechanical characteristics in workpiece subsurface layers as a result of the cutting process has a predominant influence on the performance properties of machined parts. The effect of the end milling process on the mechanical characteristics of the machined subsurface layers was evaluated using nondestructive methods: instrumented nanoindentation and sclerometry (scratching). In this paper, the influence of one of the common processes of materials processing by cutting—the process of end tool milling—on the generation of mechanical characteristics of workpiece machined subsurface layers is studied. The effect of the end milling process on the character of mechanical property formation was evaluated through the coincidence of the cutting process energy characteristics with the mechanical characteristics of the machined subsurface layers. The total cutting power and cutting work in the tertiary cutting zone area were used as energy characteristics of the end milling process. The modes of the end milling process are considered as the main parameters affecting these energy characteristics. The mechanical characteristics of the workpiece machined subsurface layers were the microhardness of the subsurface layers and the total work of indenter penetration, determined by instrumental nanoindentation, and the maximum depth of indenter penetration, determined by sclerometry. Titanium alloy Ti10V2Fe3Al (Ti-1023) was used as the machining material. Based on the evaluation of the coincidence of the cutting process energy characteristics with the specified mechanical characteristics of the machined subsurface layers, the milling mode effect of the studied titanium alloy, in particular the cutter feed and cutting speed, on the generated mechanical characteristics was established.

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Understanding the surface generation mechanism during micro-scratching of Ti-6Al-4V

Cited by 9 publications

References 38 publications

Mechanical Characteristics Generation in the Workpiece Subsurface Layers through Cutting

Mechanical Characteristics Generation in the Workpiece Subsurface Layers through Cutting

The robot grinding and polishing of additive aviation titanium alloy blades: a review

Generation of Mechanical Characteristics in Workpiece Subsurface Layers through Milling

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