A possibility of application of MTDIL to the Residual stresses analysis

Myśliński, P.; Precht, W.; Kukiełka, L.; Kamasa, P.; Pietruszka, K.; Málek, P.

doi:10.1023/b:jtan.0000033210.69839.5e

Cited by 18 publications

(19 citation statements)

References 11 publications

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“…The experimental tests were conducted with the use of a compensation dilatometer constructed by the authors, in the conditions of temperature modulation and phase-sensitive registration of thermal and dilatometric responses. The technical details of the method and the conditions of the measurement of the temperature and linear displacement of the systems under examination were described in detail in the studies [1][2][3][4]. For the purpose of a research on the impact of long-lasting thermal and mechanical loads on the stability of the systems (substrate Mo/CrN/CrCN coating) designed a specific test curve (diagnostic curve) (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…where L oT is the initial length of the substrate of the system in measurement temperature T, \A T [ is the average amplitude of the cyclic changes to the substrate temperature and \A L [ is the average amplitude of the changes to the substrate displacements [1][2][3][4]. By making measurements of the values of the indices for the substrate without the coating-deposited a AC s and for the substrate with a coating-deposited a AC l , one can determine the relative increment of the a AC ratio.…”

Section: Methodsmentioning

confidence: 99%

“…Very important element in the selection of the process technological parameters of the anti-wear coatings designed [1][2][3][4][5][6] is the anticipatory knowledge of the thermal stability of coatings. As a result of complex thermomechanical loads that follow from the use process of machine and tool parts, in the protective coatings, there occurs a thermal activation of a number of micro-and macro-scopic processes.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, laboratory diagnostic methods of substrate/gradient coating systems need to be developed, ones which are used for an identification of tests of thermally activated macro-and microscopic processes. One of such methods may be the method presented herein; it is based on dilatometry with temperature modulation [1][2][3][4]. In the method developed, during isothermic annealation or in the linear temperature change of the substrate-PVD coating system, thermal effects on the coating are represented, ones which occur in the real operational conditions.…”

Section: Introductionmentioning

confidence: 99%

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Application of dilatometry with modulated temperature for thermomechanical analysis of anti-wear coating/substrate systems

Myśliński

Szparaga

Kamasa

et al. 2015

J Therm Anal Calorim

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Modern vacuum-plasma surface modification technologies of tools for metal and wood machining are based inter alia on the deposition of thin gradient and multilayer protection coatings with a thickness of several micrometers. Exploitation of tools are frequently carried out in complex tribological nodes, where next to mechanical loads, there are significant changes in temperature at the interface of the tool/workpiece material; hence, the knowledge of the thermomechanical stability of the coatings operating under these conditions is an important criterion used in the processes of designing of wear-resistant coating technology. In this paper, the objects of research were three types of gradient PVD coating/molybdenum substrate systems, for which time courses of amplitudes of elongation and equivalent thermal expansion coefficients of the systems were measured. Experimental measurements were made using a temperature-modulated dilatometry using concepts of dynamic load thermomechanical analysis. It was demonstrated that the developed method allows a quantitative determination of the influence of the gradient layer type on the total elongation of the substrate of the system. It was also shown that the changes of thermomechanical properties of the systems during annealing process are correlated with the time evolution of the equivalent thermal expansion coefficient. In addition, using the concepts of transition function describing the continuous change of physical and chemical parameters as a function of the spatial variables and finite element method for each of the systems, the distributions of internal thermal stresses were determined.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of dilatometry with modulated temperature for thermomechanical analysis of anti-wear coating/substrate systems

Myśliński

Szparaga

Kamasa

et al. 2015

J Therm Anal Calorim

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“…Dilatometer allows phase-sensitive registration of thermal and dilatometric responses. The technical details of the method and the conditions of the measurement of temperature and linear displacement of the systems under examination, were described in detail in [22,[25][26][27][28][29][30].…”

Section: Dilatometric Testsmentioning

confidence: 99%

Analysis of Thermal Stability of CrCN Coatings Deposited on Nitrided Substrates Using Modulated Temperature Thermodilatometry

Mydłowska

Myśliński

Szparaga

et al. 2017

Archives of Metallurgy and Materials

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The aim of the research was to investigate the influence of nitriding of the substrate made of 42CrMo4 steel on thermal stability of the antiwear CrCN coating deposited on its surface using Cathodic Arc Evaporation method. Samples of non-nitrided and nitrided substrate/CrCN coating systems were tested with Modulated Temperature Thermodilatometry, which program included system annealing in 26 h, temperature of 290°C and argon atmosphere. Recorded during tests, changes in substrate elongation in response for changes of sample temperature, enabled qualitative determination of changes in stress states in the coatings as a result of samples annealing. Annealing of the system with nitrided substrate resulted in smaller change in residual stress in coating than for the system with non-nitrided substrate, which can indicate its better thermal stability. Values of residual stresses in coatings calculated by sin 2 ψ method before and after annealing on the basis of tests performed using X-Ray diffraction, agree with results of dilatometric tests.

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