Browsing NTNU Open by Author "Merson, Dmitry"
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Acoustic emission assessment of impending fracture in a cyclically loading structural steel
Rastegaev, Igor; Danyuk, Alexey; Afanas’yev, Maxim; Merson, Dmitry; Berto, Filippo; Vinogradov, Alexei (Peer reviewed; Journal article, 2016)Using the advanced acoustic emission (AE) technique, we address the problem of early identification of crack initiation and growth in ductile structural steels under cyclic loading. The notched 9MnSi5 steel specimens with ... -
Attaining High Functional Performance in Biodegradable Mg-Alloys: An Overview of Challenges and Prospects for the Mg-Zn-Ca System
Vinogradov, Alexei; Merson, Evgeniy; Myagkikh, Pavel; Linderov, Mikhail; Brilevsky, Alexandr; Merson, Dmitry (Peer reviewed; Journal article, 2023)This article presents a concise overview of modern achievements and existing knowledge gaps in the area of biodegradable magnesium alloys. Hundreds of Mg-based alloys have been proposed as candidates for temporary implants, ... -
Corrosion Fatigue of Fine Grain Mg-Zn-Zr and Mg-Y-Zn Alloys
Linderov, Mikhail; Vasilev, Evgeni; Merson, Dmitry; Markushev, Mikhail; Vinogradov, Alexey (Journal article; Peer reviewed, 2018)Corrosion fatigue data for magnesium alloys are still scarce. The present communication reports the results of microstructural investigations and fatigue testing of the fine grain Mg-Zn-Zr (ZK60) alloy after multiaxial ... -
Effect of deformation processing of the dilute Mg-1Zn-0.2Ca alloy on the mechanical properties and corrosion rate in a simulated body fluid
Merson, Dmitry; Brilevsky, Alexander; Myagkikh, Pavel; Markushev, Mikhail; Vinogradov, Alexey (Peer reviewed; Journal article, 2020)Magnesium and its alloys have several competitive advantages due to their low density and the highest specific strength among modern structural metallic materials. However, the relatively low ductility and poor corrosion ... -
Effect of equal-channel angular pressing (ECAP) and current density of cathodic hydrogen charging on hydrogen trapping in the low-alloy steel
Merson, Evgeni; Myagkikh, Pavel; Klevtsov, G.V.; Merson, Dmitry; Vinogradov, Alexey (Peer reviewed; Journal article, 2020)Owing to the outstanding mechanical properties, the steels and other metallic materials with the ultra-fine grained (UFG) microstructure obtained by severe plastic deformation (SPD) techniques such as equal channel angular ... -
Evolution of Mechanical Twinning during Cyclic deformation of Mg-Zn-Ca Alloys
Vinogradov, Alexei; Vasilev, Evgeni; Linderov, Mikhail; Merson, Dmitry (Peer reviewed; Journal article, 2016)The present study clarifies the complex interplay between mechanical twinning and dislocation slip during low-cycle fatigue testing of Mg-Zn-Ca alloys. Temporal details of these mechanisms are studied non-destructively by ... -
The Functional Properties of Mg–Zn–X Biodegradable Magnesium Alloys
Merson, Dmitry; Brilevsky, Alexander; Myagkikh, Pavel; Tarkova, Alexandra; Prokhorikhin, Alexei; Kretov, Evgeni; Frolova, Tatyana; Vinogradov, Alexey (Journal article; Peer reviewed, 2020)The implantation of metallic devices in orthopaedic surgical procedures and coronary angioplasty is associated with the risk of various adverse events: (i) mechanical (premature failure), (ii) chemo-mechanical (corrosion ... -
The fundamental difference between cleavage and hydrogen-assisted quasi-cleavage in ferritic materials revealed by multiscale quantitative fractographic and side surface characterization
Merson, Evgeniy; Myagkikh, Pavel; Poluyanov, Vitaliy; Dorogov, Maxim; Merson, Dmitry; Vinogradov, Alexey (Peer reviewed; Journal article, 2021)The fracture surfaces and cracks in technically pure iron, Fe-2.5% Si alloy and low-carbon steel grade S235JR produced by quasi-cleavage (QC) hydrogen-assisted cracking (HAC) as well as by true cleavage (TC) were studied ... -
Heat dissipation and acoustic emission features of titanium alloys in cyclic deformation mode
Iziumova, A. Yu.; Vshivkov, A.N.; Prokhorov, A.E.; Panteleev, I.A.; Mubassarova, V.A.; Plekhov, O.A.; Linderov, Mikhail; Merson, Dmitry; Vinogradov, Alexey (Peer reviewed; Journal article, 2021)The present work unveils the features of heat dissipation and acoustic emission accompanying the fatigue crack growth in a titanium alloy (Ti-0.8Al-0.8Mn and Ti Grade 2) using the compact tension and Charpy V-notch specimens. ... -
High Performance Fine-Grained Biodegradable Mg-Zn-Ca Alloys Processed by Severe Plastic Deformation
Vinogradov, Alexey; Vasilev, Evgeni; Kopylov, Vladimir I; Linderov, Mikhail; Brilevesky, Alexander; Merson, Dmitry (Journal article; Peer reviewed, 2019)The tensile strength, fatigue, and corrosion fatigue performance of the magnesium alloy ZX40 benefit strongly from hybrid deformation processing involving warm equal-channel angular pressing (ECAP) at the first step and ... -
Inhibiting stress corrosion cracking by removing corrosion products from the Mg-Zn-Zr alloy pre-exposed to corrosion solutions
Merson, Evgeniy; Poluyanov, Vitaliy; Myagkikh, Pavel; Merson, Dmitry; Vinogradov, Alexey (Peer reviewed; Journal article, 2021)Magnesium and its alloys are susceptible to stress-corrosion cracking (SCC), which can manifest itself during the slow-strain rate tensile (SSRT) testing in air if the specimens were pre-exposed to corrosive media. This ... -
Monitoring Dynamic Recrystallisation in Bioresorbable Alloy Mg-1Zn-0.2Ca by Means of an In Situ Acoustic Emission Technique
Merson, Dmitry; Linderov, Mikhail; Brilevsky, Alexander; Danyuk, Alexey; Vinogradov, Alexei (Peer reviewed; Journal article, 2022)The tensile behaviour of the biocompatible alloy Mg-1Zn-0.2Ca (in wt.%) in the fine-grained state, obtained by severe plastic deformation via multiaxial isothermal forging, has been investigated in a wide range of temperatures ... -
On the Corrosion Fatigue of Magnesium Alloys Aimed at Biomedical Applications: New Insights from the Influence of Testing Frequency and Surface Modification of the Alloy ZK60
Linderov, Mikhail; Brilevsky, Alexander; Merson, Dmitry; Danyuk, Alexei; Vinogradov, Alexei (Peer reviewed; Journal article, 2022)Magnesium alloys are contemporary candidates for many structural applications of which medical applications, such as bioresorbable implants, are of significant interest to the community and a challenge to materials scientists. ... -
On the role of pre-exposure time and corrosion products in stress-corrosion cracking of ZK60 and AZ31 magnesium alloys
Merson, Evgeniy; Poluyanov, Vitaliy; Myagkikh, Pavel; Merson, Dmitry; Vinogradov, Alexey (Peer reviewed; Journal article, 2021)Pre-exposure of Mg alloys to corrosive media causes their embrittlement, which has been long associated with diffusible hydrogen penetrating into the metal. The time of the pre-exposure was suggested to promote embrittlement ... -
The processing route towards outstanding performance of the severely deformed Al–Mg–Mn-Sc-Zr alloy
Avtokratova, E. V.; Sitdikov, Oleg; Markushev, Mikhail; Linderov, Mikhail; Merson, Dmitry; Vinogradov, Alexey (Journal article, 2021)Aiming at obtaining the enhanced mechanical properties profile for lightweight applications, bulk billets of the commercial 1570C aluminium alloy (Al–5Mg-0.18Mn-0.20Sc-0.08Zr, wt. %) with nanosized aluminides of transition ... -
Quantitative comparison of cleavage and quasi-cleavage fracture surfaces in hydrogen embrittled low-carbon steel
Merson, E.D.; Poluyanov, Vitaliy; Myagkikh, Pavel; Merson, Dmitry; Vinogradov, Alexey (Journal article; Peer reviewed, 2020)The formation mechanism of the quasi-cleavage (QC) fracture surface in hydrogen embrittled low-carbon steels is not fully understood and is, therefore, intensively debated in the literature. At present, there are two ... -
A Time-Frequency Based Approach for Acoustic Emission Assessment of Sliding Wear
Rasteagev, Igor; Merson, Dmitry; Rastegaeva, Inna; Vinogradov, Alexey (Peer reviewed; Journal article, 2020)The acoustic emission method is one of few contemporary non-destructive testing techniques enabling continuous on-line health monitoring and control of tribological systems. However, the existence of multiple “pseudo”-acoustic ...