The machinability of nickel-based alloys: a review

Ezugwu, E. O.; Wang, Z.M.; Machado, Álisson Rocha

doi:10.1016/s0924-0136(98)00314-8

Cited by 673 publications

(291 citation statements)

References 10 publications

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“…In general, the wear generated in the cutting tools when working with nickel base alloys are not from a single kind wear, but a several combination of them. Thus, the various factors such as high temperature, high workpiece material resistance, high plastic deformation, surface layer hardening during machining, high tension in the tool-chip interface and chip abrasive, are responsible to generate this type of wear (Richards & Aspinwall, 1989;Iuliano &Gatto, 1994 andEzugwu et al 1999). Turning at 90 m/min speed machining we had cases of cutting edge chipping in the carbide tool.…”

Section: Resultsmentioning

confidence: 99%

“…and feed rates up to 0.5 mm/rev. to obtain good productivity (Ezugwu, et al 1999) and (Kramer, 1987). Carbide tools have low stability and thermochemistry there is significant dissolution/diffusion of the material in the tool-chip interface causing wear of the tool when used for machining speeds exceeding 30 m/min.…”

Section: Advanced Materials Research Vol 278 313mentioning

confidence: 99%

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Study of the Turning Nickel Base Alloy Pyromet<sup>®</sup> 31V (SAE HEV8)

Ribeiro

Bahia

2011

AMR

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Abstract. Considering the constant technological developments in the aeronautical, space, automotive, shipbuilding, nuclear and petrochemical fields, among others, the use of materials with high strength mechanical capabilities at high temperatures has been increasingly used. Among the materials that meet the mechanical strength and corrosion properties at temperatures around 815 °C one can find the nickel base alloy Pyromet® 31V (SAE HEV8). This alloy is commonly applied in the manufacturing of high power diesel engines exhaust valves where it is required high resistance to sulphide, corrosion and good resistance to creep. However, due to its high mechanical strength and low thermal conductivity its machinability is made difficult, creating major challenges in the analysis of the best combinations among machining parameters and cutting tools to be used. Its low thermal conductivity results in a concentration of heat at high temperatures in the interfaces of workpiece-tool and tool-chip, consequently accelerating the tools wearing and increasing production costs. This work aimed to study the machinability, using the carbide coated and uncoated tools, of the hot-rolled Pyromet® 31V alloy with hardness between 41.5 and 42.5 HRC. The nickel base alloy used consists essentially of the following components: 56.5% Ni, 22.5% Cr, 2,2% Ti, 0,04% C, 1,2% Al, 0.85% Nb and the rest of iron. Through the turning of this alloy we able to analyze the working mechanisms of wear on tools and evaluate the roughness provided on the cutting parameters used. The tests were performed on a CNC lathe machine using the coated carbide tool TNMG 160408-23 Class 1005 (ISO S15) and uncoated tools TNMG 160408-23 Class H13A (ISO S15). Cutting fluid was used so abundantly and cutting speeds were fixed in 75 and 90 m/min. to feed rates that ranged from 0.12, 0.15, 0.18 and 0.21 mm/rev. and cutting depth of 0.8mm. The results of the comparison between uncoated tools and coated ones presented a machined length of just 30% to the first in relation to the performance of the second. The coated tools has obtained its best result for both 75 and 90 m/min. with feed rate of 0.15 mm/rev. unlike the uncoated tool which obtained its better results to 0.12 mm/rev.

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Section: Resultsmentioning

confidence: 99%

Section: Advanced Materials Research Vol 278 313mentioning

confidence: 99%

Study of the Turning Nickel Base Alloy Pyromet<sup>®</sup> 31V (SAE HEV8)

Ribeiro

Bahia

2011

AMR

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“…By this time, the abrasive wear is the main wear pattern. The abrasive wear is because the impurities and hard particles exist in the workpiece material [18], such as carbon, nitride, and oxide compounds. The photographs of cutting chips produced at 5 min and 20 min cutting time were shown in Figures 12(a) and 12(b), respectively.…”

Section: Wear Characteristics and Chip Analysismentioning

confidence: 99%

A Study on Ultrasonic Elliptical Vibration Cutting of Inconel 718

Haidong

Zou

et al. 2016

Shock and Vibration

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Inconel 718 is a kind of nickel-based alloys that are widely used in the aerospace and nuclear industry owing to their high temperature mechanical properties. Cutting of Inconel 718 in conventional cutting (CC) is a big challenge in modern industry. Few researches have been studied on cutting of Inconel 718 using single point diamond tool applying the UEVC method. This paper shows an experimental study on UEVC of Inconel 718 by using polycrystalline diamond (PCD) coated tools. Firstly, cutting tests have been carried out to study the effect of machining parameters in the UEVC in terms of surface finish and flank wear during machining of Inconel 718. The tests have clearly shown that the PCD coated tools in cutting of Inconel 718 by the UEVC have better performance at 0.1 mm depth of cut as compared to the lower 0.05 mm depth of cut and the higher 0.12 or 0.15 mm depth of cut. Secondly, like CC method, the cutting performance in UEVC increases with the decrease of the feed rate and cutting speed. The CC tests have also been carried out to compare performance of CC with UEVC method.

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“…Inconel 625. Inconel 625 belongs to category of superalloys, which have high tensile strength in high temperatures, good fatigue strength and outstanding corrosion and oxidation resistance [1]. The properties of this material that make it an excellent choice in many demanding applications causes however, many difficulties in its machining.…”

Section: Introductionmentioning

confidence: 99%

Chatter identification in milling of Inconel 625 based on recurrence plot technique and Hilbert vibration decomposition

Lajmert¹,

Rusinek²,

Kruszyński³

2018

MATEC Web Conf.

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Abstract. In the paper a cutting stability in the milling process of nickel based alloy Inconel 625 is analysed. This problem is often considered theoretically, but the theoretical finding do not always agree with experimental results. For this reason, the paper presents different methods for instability identification during real machining process. A stability lobe diagram is created based on data obtained in impact test of an end mill. Next, the cutting tests were conducted in which the axial cutting depth of cut was gradually increased in order to find a stability limit. Finally, based on the cutting force measurements the stability estimation problem is investigated using the recurrence plot technique and Hilbert vibration decomposition method.

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The machinability of nickel-based alloys: a review

Cited by 673 publications

References 10 publications

Study of the Turning Nickel Base Alloy Pyromet<sup>®</sup> 31V (SAE HEV8)

Study of the Turning Nickel Base Alloy Pyromet<sup>®</sup> 31V (SAE HEV8)

A Study on Ultrasonic Elliptical Vibration Cutting of Inconel 718

Chatter identification in milling of Inconel 625 based on recurrence plot technique and Hilbert vibration decomposition

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