Emergent behavior of nano-multilayered coatings during dry high-speed machining of hardened tool steels

Fox-Rabinovich, German; Yamamoto, Kenji; Beake, Ben D.; Ковалев, А. И.; Aguirre, Myriam H.; Veldhuis, Stephen C.; Dosbaeva, G.K.; Wainstein, Dmitry; Biksa, A.; Rashkovskiy, A.

doi:10.1016/j.surfcoat.2010.04.002

Cited by 62 publications

(85 citation statements)

References 28 publications

(94 reference statements)

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“…It has been found that there are two types of tribofilms that are formed on the frictional body as a result of structural modification and interaction with the environment: (1) super-ductile and lubricating films [12]; and (2) tribo-ceramics with thermal barrier properties and increased hardness and strength [10,24,26,27,[30][31][32][33][34][35][36][37][38][39]. Tribofilms (SS) of the first type (SS-I) are observed as a result of structural activation marked by an increase in the density of atomic defects at the surface.…”

Section: Thermodynamics Of Tribofilmsmentioning

confidence: 99%

Tribofilm Formation As a Result of Complex Interaction at the Tool/Chip Interface during Cutting

Fox-Rabinovich

Гершман²,

Hakim

et al. 2014

Lubricants

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Tribofilms are dynamic structures that form at the interface during frictional sliding. These films play a significant role in friction control, particularly under heavy loaded/high temperature conditions, such as those found at the cutting tool/chip interface. The thermodynamic aspects of tribofilm formation are discussed here. Thermodynamic analysis of entropy production during friction shows that there are two types of tribofilms that affect the wear behavior of a cutting tool: (1) tribofilms forming as a result of the surface modification of the cutting tools with further tribo-oxidation; and (2) tribofilms that form as a result of material transfer from the contacting frictional body (the workpiece) during the tool/chip interaction. Experimental examples are presented, outlining the beneficial role of both types of tribofilms.

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Section: Thermodynamics Of Tribofilmsmentioning

confidence: 99%

Tribofilm Formation As a Result of Complex Interaction at the Tool/Chip Interface during Cutting

Fox-Rabinovich

Гершман²,

Hakim

et al. 2014

Lubricants

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“…Examples include interrupted cutting (milling), contact between valve-train components in internal combustion engines and collisions between air-borne particulates and gas turbine blades [26,27,52,[97][98][99]. The ability to simulate the relevant in-service contact conditions is highly desirable in the development of materials for these applications and the nano-impact technique is increasingly being used for this purpose.…”

Section: Nano-impactmentioning

confidence: 99%

Advanced Nanomechanical Test Techniques

Beake¹,

Harris²,

Liskiewicz³

2015

Materials Characterization

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“…Therefore, effective protection of friction surfaces is required. To address all these phenomena, novel surface engineering methods should undoubtedly be multifunctional [17].…”

Section: Introductionmentioning

confidence: 99%

“…While each of the emergent characteristics individually contributes to the system performance, the overall organizational design is intended to create a performance that relies heavily on the interaction and synergy among these characteristics [57]. An emergent phenomenon is a universal mechanism that generates complexity [17,52,58,59]. For complex dynamical systems designed for severe applications, a special interest has to be paid to the emergence of collective behavior near a critical point of a phase transition, either by tuning and/or by self-organization [49][50][51][52].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical adaptive nanostructured PVD coatings for extreme tribological applications: the quest for nonequilibrium states and emergent behavior

Fox-Rabinovich

Yamamoto

Beake

et al. 2012

Science and Technology of Advanced Materials

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Adaptive wear-resistant coatings produced by physical vapor deposition (PVD) are a relatively new generation of coatings which are attracting attention in the development of nanostructured materials for extreme tribological applications. An excellent example of such extreme operating conditions is high performance machining of hard-to-cut materials. The adaptive characteristics of such coatings develop fully during interaction with the severe environment. Modern adaptive coatings could be regarded as hierarchical surface-engineered nanostructural materials. They exhibit dynamic hierarchy on two major structural scales: (a) nanoscale surface layers of protective tribofilms generated during friction and (b) an underlying nano/microscaled layer. The tribofilms are responsible for some critical nanoscale effects that strongly impact the wear resistance of adaptive coatings. A new direction in nanomaterial research is discussed: compositional and microstructural optimization of the dynamically regenerating nanoscaled tribofilms on the surface of the adaptive coatings during friction. In this review we demonstrate the correlation between the microstructure, physical, chemical and micromechanical properties of hard coatings in their dynamic interaction (adaptation) with environment and the involvement of complex natural processes associated with self-organization during friction. Major physical, chemical and mechanical characteristics of the adaptive coating, which play a significant role in its operating properties, such as enhanced mass transfer, and the ability of the layer to provide dissipation and accumulation of frictional energy during operation are presented as well. Strategies for adaptive nanostructural coating Topical Review design that enhance beneficial natural processes are outlined. The coatings exhibit emergent behavior during operation when their improved features work as a whole. In this way, as higher-ordered systems, they achieve multifunctionality and high wear resistance under extreme tribological conditions.

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Emergent behavior of nano-multilayered coatings during dry high-speed machining of hardened tool steels

Cited by 62 publications

References 28 publications

Tribofilm Formation As a Result of Complex Interaction at the Tool/Chip Interface during Cutting

Tribofilm Formation As a Result of Complex Interaction at the Tool/Chip Interface during Cutting

Advanced Nanomechanical Test Techniques

Hierarchical adaptive nanostructured PVD coatings for extreme tribological applications: the quest for nonequilibrium states and emergent behavior

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