Preliminary evaluation of the applicability of F, V and AEsignals in diagnosis of ADI machining process

Myszka, D.; Bombiński, Sebastian

doi:10.2478/afe-2014-0021

Cited by 2 publications

(2 citation statements)

References 7 publications

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“…2. Both the temperature values and duration of each stage of treatment were selected after careful analysis of some studies on heat treatment of nodular and vermicular graphite cast iron [30][31][32][33][34][35][36][37]. The following variants were finally assumed:…”

Section: The Purpose Of Investigation and The Research Materialsmentioning

confidence: 99%

Archives of Foundry Engineering

Jakubus

2022

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The article presents the results of research on the abrasion resistance of cast iron with vermicular graphite in the as-cast state and after austempering (the latter material is referred to as AVGI -Austempered Vermicular Graphite Iron). Austenitization was carried out at the temperature values of either 900°C or 960°C, and austempering at the temperature values of either 290°C and or 390°C. Both the austenitization and the austempering time was equal to 90 minutes. The change of the pearlitic-ferritic matrix to the ausferritic one resulted in an increase in mechanical properties. Abrasion tests were conducted by means of the T-01M pin-on-disc tribometer. The counter-sample (i.e. the disc) was made of the JT6500 friction material. Each sample was subject to abrasion over a sliding distance of 4000 m. The weight losses of both samples and counter-samples were determined by the gravimetric method. It was found that the vermicular cast iron austenitized at 900°C and austempered at 290°C was characterized by the lowest wear among the evaluated cast iron types. The geometric structure of the surface layer after the dry friction test exhibited irregular noticeable grooves, distinct oriented abrasion traces, plastic flow of the material, microcracks, and pits generated by tearing out the abraded material. The largest surface roughness was found for the AVGI cast iron heat-treated according to the variant 3 (Tγ =900 ºC; Tpi = 390°C), while the smallest one occurred in AVGI cast iron subject to either the variant 2 (Tγ =960 ºC; Tpi = 290°C) or the variant 4 (Tγ =900 ºC; Tpi = 290°C) of heat treatment and was equal to either 2.5 µm or 2.66 µm, respectively. It can be seen that the surface roughness decreases with the decrease in the austempering temperature.

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Section: The Purpose Of Investigation and The Research Materialsmentioning

confidence: 99%

Archives of Foundry Engineering

Jakubus

2022

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“…The main objective of this study is to develop a computer system that would support the technologist in his decision on the choice of ADI and its possible variations ( [1], [2], [3]) in all those cases where this cast iron is expected to offer certain functional properties (e.g. tensile strength Rm, yield strength Rp0.2).…”

Section: Introductionmentioning

confidence: 99%

Application of ALSV(FD) logic and XTT knowledge representation in the range of ADI properties

Regulski

Wilk-Kołodziejczyk²,

Rojek

et al. 2016

Archives of Foundry Engineering

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The objective of studies presented in this publication was structuring of research knowledge about the ADI functional properties and changes in these properties due to material treatment. The results obtained were an outcome of research on the selection of a format of knowledge representation that would be useful in further work aiming at the design, application and implementation of an effective system supporting the decisions of a technologist concerning the choice of a suitable material (ADI in this case) and appropriate treatment process (if necessary). ALSV(FD) logic allows easy modelling of knowledge, which should let addressees of the target system carry out knowledge modelling by themselves. The expressiveness of ALSV (FD) logic allows recording the values of attributes from the scope of the modelled domain regarding ADI, which is undoubtedly an advantage in the context of further use of the logic. Yet, although the logic by itself does not allow creating the rules of knowledge, it may form a basis for the XTT format that is rule-based notation. The difficulty in the use of XTT format for knowledge modelling is acceptable, but formalism is not suitable for the discovery of rules, and therefore the knowledge of technologist is required to determine the impact of process parameters on values that are functional properties of ADI. The characteristics of ALSV(FD) logic and XTT formalism, described in this article, cover the most important aspects of a broadly discussed, full evaluation of the applicability of these solutions in the construction of a system supporting the decisions of a technologist. Keywords:Computer-aided foundry production, Application of information technologies in the field of foundry, ADI, the ALSV (FD) logic of attributes, Rule-based XTT format

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Preliminary evaluation of the applicability of F, V and AEsignals in diagnosis of ADI machining process

Cited by 2 publications

References 7 publications

Archives of Foundry Engineering

Archives of Foundry Engineering

Application of ALSV(FD) logic and XTT knowledge representation in the range of ADI properties

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