Special features of strain-induced surface roughness formed in specimens with curvilinear geometry of the hardened surface layer-substrate interface

AbstractSurface modification of the carbon included polyethylene (semi-conductive PE) surface for metallizing using a low pressure RF discharge plasma has been carried out. The contact angle was used as a measure of the wettability of the PE surface. The roughness and the chemical bondings in PE surface layer were analized by DFM and XPS, respectively. Typical results show that the contact angle decreases from approximately 94° to below 10° after several minutes' treatment and recovers to a saturation value when it was put open to the air after treatment. The saturation value of the contact angle is smaller as the gas pressure for treatment is higher and the treatment time is longer but all are below approximately 60° which is still smaller than that of untreated. DFM and XPS results show that the surface roughness and the bondings C-O and C=O in the PE surface layer also increase with increasing the treatment time and seem to be responsible for improving the hydrophilic property of PE. After pretreatment process, nickel was coated on the PE sheet by electrodeposition method and a good adhesion between the nickel layer and the PE surface compared with that of untreated was obtained.

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Rated definition of degree of cutter coating influence upon parameters of surface layer quality of parts worked

Science intensive technologies in mechanical engineering ◽

10.12737/article_595256f1a5fff7.38096621 ◽

2017 ◽

Vol 2 (7) ◽

pp. 20-24

Author(s):

Вячеслав Безъязычный ◽

Vyacheslav Bezyazychnyy ◽

Максим Басков ◽

Maksim Baskov

Keyword(s):

Surface Roughness ◽

Surface Layer ◽

Residual Stresses ◽

Layer Surface ◽

Wear Resistant Coatings ◽

Cutter Wear ◽

Definition Of ◽

Surface Layer Quality ◽

The Impact

The impact of cutter wear-resistant coatings upon cutting process parameters and characteristics of surface layer quality in the parts worked: residual stresses, a degree and a depth of work hardening of a surface layer, surface roughness is investigated.

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Calculated determination of strength characteristics of assembly joints with tightness taking into account the technological conditions for processing the surfaces

10.36652/0202-3350-2021-22-01-30-34 ◽

2021 ◽

pp. 30-34

Author(s):

V.F. Bezjazychnyi ◽

M.A. Prokofiev ◽

F.R. Zhirnova

Keyword(s):

Surface Roughness ◽

Surface Layer ◽

Quality Indicators ◽

Strength Characteristics

The method of calculating the strength of the joint with tension taking into account the technological conditions for processing the mating surfaces, which determine the quality indicators of the surface layer of the material of these surfaces: the surface roughness and the degree of their hardening, was described.

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Failure Analysis in Precision Manufacturing

Advances in Business Information Systems and Analytics - Analytical Approaches to Strategic Decision-Making ◽

10.4018/978-1-4666-5958-2.ch017 ◽

2014 ◽

pp. 339-347

Author(s):

Kouroush Jenab ◽

Saeid Moslehpour

Keyword(s):

Surface Roughness ◽

Surface Layer ◽

Failure Analysis ◽

Markovian Model ◽

Precision Manufacturing ◽

Machine Accuracy ◽

Dimensional Precision ◽

Process Robustness ◽

Sources Of Error

Precision manufacturing is a process to produce products with tolerances smaller than 1 part in 104 or 105. The process is based on dimensional precision, angular precision, form precision, surface roughness, kinematic precision, and surface layer alternations. There are sources of error in precision manufacturing that are enemies of precision processes. In this chapter, these sources are explored and a Markovian model is developed for evaluating process robustness and machine accuracy. An illustrative example is presented here in order to demonstrate the application of the model in industries dealing with precision processes.

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Effect of Ultrasonic Surface Rolling Treatment on Corrosion Behavior of Alloy 690

Metals ◽

10.3390/met10070917 ◽

2020 ◽

Vol 10 (7) ◽

pp. 917 ◽

Cited By ~ 1

Author(s):

Jiang Liu ◽

Junbiao Liu ◽

Xuehui Zhang ◽

Tahir Ahmad ◽

Tongxiang Liang ◽

...

Keyword(s):

Surface Roughness ◽

Surface Layer ◽

Corrosion Behavior ◽

Electrochemical Corrosion ◽

Coarse Grained ◽

Alloy 690 ◽

Average Grain Size ◽

Before And After ◽

Immersion Experiment ◽

Secondary Side

The nanograins (NG) on the top surface layer of alloy 690 were successfully prepared by ultrasonic surface rolling treatment (USRT). The average grain size of NG alloy 690 was 55 nm, and the thickness of the NG surface layer was about 1 μm. Meanwhile, the surface roughness was significantly reduced after surface nanocrystalliztion. The corrosion behavior of alloy 690 before and after USRT was studied in a secondary side environment containing chloride. Electrochemical corrosion experiments demonstrated that the passive film generated by USRT was denser than that formed on coarse-grained (CG) alloy 690. Pitting corrosion was prone to occur in grain boundaries of CG alloy 690, and the pits on the surface of NG alloy 690 were smaller than those generated on CG alloy 690 after 1000 h of an immersion experiment.

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