Chip formation, cutting forces, and tool wear in turning of Zr-based bulk metallic glass

Bakkal, Mustafa

doi:10.1016/s0890-6955(04)00037-9

Cited by 23 publications

(43 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presumed above all generation mechanisms achieving the precise finishing level in both BMGs are connected with 12) showed the chips morphology with melting or large deformations, as the d might be large in comparison with us. Therefore, our result of slipping off generation mechanism of the chips obtained from the observation on side and front surfaces of the chips and the result of no builtup edges obtained from the observation on the back surfaces of the chips had not been mentioned in their report.…”

Section: Observation Of the Chipsmentioning

confidence: 54%

“…Recently, Bakkal et al had reported the chip light emission and morphology, cutting forces, surface roughness and tool wear through the investigation of the turning of Zr-based BMG together with an Al alloy and SUS304 stainless steel under the same cutting condition using the different tool materials. [10][11][12] Authors also had presented the cutting force, surface roughness, and cut surface and chip morphology through the investigation of the turning of not only the Zr-based BMG having the large toughness but also Pd-based BMG having the small toughness together with a steel and free-cutting brass under the same cutting conditions using the different tool materials and nose tip radii. 13,14) The results of the author's presents are summarized in this paper.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cutting Characteristics of Bulk Metallic Glass

et al. 2005

View full text Add to dashboard Cite

The establishment of appropriate machining techniques for bulk metallic glasses (BMGs), which exhibit excellent mechanical, physical and chemical properties, is required to apply the BMGs. In this report, the cutting characteristics of BMGs were examined by turning with different tool materials, nose radii (R n ) and cutting speeds (V). Round bars of Zr 65 Cu 15 Ni 10 Al 10 and Pd 40 Cu 30 Ni 10 P 20 at% BMGs were used as the workpieces. In order to compare the cuttability of the BMGs with that of crystalline alloys, steel (JIS SGD-400D) and free-cutting brass (JIS C3604) were used. The principal cutting force (F H ) and surface roughness (R a ) of the machined surfaces were measured. X-ray diffraction patterns were also obtained from the machined surfaces. The value of R a in the BMGs exhibit the upper end of precise finishing level (i.e., R a ¼ 0:2 mm), and was remarkably lower compared with the steel and a little lower compared with the free-cutting brass in spite of the value of V. The value became smaller with increasing values of R n , exhibiting a very low value of 0.08 mm for an R n value of 1.2 mm. The values of F H in both BMGs did not show a clear difference and were half that of the steel for a V value less than 40 m/min, even though the tensile strength of the BMGs was twice as large as the steel. The chip of the BMGs showed an ideal flow type with very short and regular intervals, formed by planar slip, and revealed very homogeneous, flat and featureless back surfaces. From these observations of chips, it is presumed that the reason for the excellent cuttability of BMGs is due to a slipping-off mechanism at planes of very short intervals decided only by the maximum shear stress and non-built-up edges caused by a low glass transition temperature.

show abstract

Section: Observation Of the Chipsmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Cutting Characteristics of Bulk Metallic Glass

et al. 2005

View full text Add to dashboard Cite

show abstract

“…The minimum°ank wears measured on the TiAlN-and AlCrN-coated and uncoated carbide tools were 0.05, 0.04 and 0.09 mm, respectively, which are higher than the tool wear measured in the bilayer-coated tool insert. 19 The built-up edge formation was observed in L 2 (i.e.…”

Section: Tool Wear Analysismentioning

confidence: 97%

Comparative Evaluation of Performances of TiAlN-, AlCrN- and AlCrN/TiAlN-Coated Carbide Cutting Tools and Uncoated Carbide Cutting Tools on Turning EN24 Alloy Steel

Kumar

Prabu

Kumar³

2017

J. Adv. Manuf. Syst.

View full text Add to dashboard Cite

In the present work, the performances of TiAlN-, AlCrN-and AlCrN/TiAlN-coated and uncoated tungsten carbide cutting tool inserts are evaluated from the turning studies conducted on EN24 alloy steel workpiece. The output parameters such as cutting forces, surface roughness and tool wear for TiAlN-, AlCrN-and AlCrN/TiAlN-coated carbide cutting tools are compared with uncoated carbide cutting tools (K10). The design of experiment based on Taguchi's approach is used to obtain the best turning parameters, namely cutting speed (V ), feed rate (f) and depth of cut (d), in order to have a better surface¯nish and minimum tool°ank wear. An orthogonal array (L 9 Þ was used to conduct the experiments. The results show that the AlCrN/ TiAlN-coated cutting tool provided a much better surface¯nish and minimum tool°ank wear. The minimum tool°ank wear and minimum surface roughness were obtained using AlCrN/ TiAlN-coated tools, when V ¼ 160 m/min, f ¼ 0:318 mm/rev and d ¼ 0:3 mm.

show abstract

“…The high hardness of MGs (usually 6-8 times of copper) accelerates the tool wear which affects the uniformity and accuracy of the cutting surface [16,17]. For some hard-brittle MGs, mechanical machining becomes more difficult.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, oxidation and crystallization of MGs may occur [20] which probably affect their amorphous performances [21,22], but this kind of effects is dependent of the properties and volume fraction of the crystalline phases [21][22][23] as well as the sample preparation and evaluation methods [24,25]. In addition, high local temperature will also increase the adhesion between the chip and tool, leading to the formation of built-up edge on the rake face, and thus affect the subsequent cutting process [16,26]. Hence, fabrication of micro/nanostructured surfaces on MGs by mechanical machining is challenging.…”

Section: Introductionmentioning

confidence: 99%

Nanosecond pulsed laser irradiation induced hierarchical micro/nanostructures on Zr-based metallic glass substrate

et al. 2016

View full text Add to dashboard Cite

• Hierarchical micro/nanostructures were fabricated on a metallic glass substrate by nanosecond pulsed laser irradiation.• It retained amorphous characteristic and exhibited uniform element distribution.• Irradiation parameters induced change from cotton-like to particle-like nanostructure.• Formation mechanism and mechanical properties were investigated. A large effective surface area is beneficial to enhance the applications of metallic glasses (MGs) in heterogeneous catalysis and biomedical engineering. For the purpose of increasing effective surface area, in this study, hierarchical micro/nanostructures were fabricated on a Zr-based MG substrate by nanosecond pulsed laser irradiation. Experimental results indicated that a layer of micron-scale laser pulse tracks covered by a cotton-like MG thin film with nanometer-scale microstructure was formed in the laser irradiated region. This hierarchical micro/nanostructures retained amorphous characteristic and exhibited uniform element distribution. Its formation mechanism was investigated by analyzing the laser irradiation process and morphologies. Nanoindentation results indicated that the cotton-like MG thin film was very loose and soft compared to the as-cast MG substrate, showing different plastic deformation behavior. Results from this study indicate that nanosecond pulsed laser irradiation is an effective method to generate hierarchical micro/nanostructures on MG substrates, which can increase their effective surface areas and improve their potential applications as biomaterials and catalysts.

show abstract

Chip formation, cutting forces, and tool wear in turning of Zr-based bulk metallic glass

Cited by 23 publications

References 0 publications

Cutting Characteristics of Bulk Metallic Glass

Cutting Characteristics of Bulk Metallic Glass

Comparative Evaluation of Performances of TiAlN-, AlCrN- and AlCrN/TiAlN-Coated Carbide Cutting Tools and Uncoated Carbide Cutting Tools on Turning EN24 Alloy Steel

Nanosecond pulsed laser irradiation induced hierarchical micro/nanostructures on Zr-based metallic glass substrate

Contact Info

Product

Resources

About