Study on the Microstructure and Wear Resistance of the High-Speed Laser-Cladded Coating on the Cutterhead of Mining Machine by GUO Shirui, DING Shouwen, CUI Lujun, CHEN Shuisheng, DU Quanbin, GUO Chuan, XUE Xiaoqiang

“…To improve the microstructure of the alloy coating and enhance the mechanical properties of the cutter head in coal mining machines，Fe-based alloy cladding layers (S1 and S2) were fabricated on mining cutter head surfaces at two scanning speeds of 0.5 m/min and 12 m/min.The metallographic microstructure， mechanical properties and tribological performance of coatings were systematically characterized by scanning electron microscopy (SEM)， Vickers hardness tester， and X-ray diffraction (XRD).Results showed both coatings exhibited dense microstructures without defects such as pores or cracks.The top layer of both laser-clad coatings consisted of equiaxed crystals， the middle layer was composed of columnar crystals， and the bottom layer consisted of planar crystals.Moreover， the overall microstructure of the S2 coating was finer than that of S1， and the overlay layers were primarily composed of an α-Fe solid solution， Cr2B and FeNi.The γ-Fe phase precipitated in S1， while the diffraction angle of the α-Fe phase in S2 shifted to a lower angle than that of S1.Both coatings had higher microhardness than the substrate，with the S2 coating showing the highest microhardness of 651 HV0.5.The strengthening mechanisms of the coating mainly included grain refinement strengthening and solid solution strengthening.Besides， S2 demonstrated the best tribological performance， and the wear rate of the substrate was 7.3 times that of S2.The wear mechanism of the substrate was adhesive wear， whereas that of the coatings was primarily abrasive wear.…”
Get full text

Damage of additively manufactured polymer materials: experimental and probabilistic analysis by Hachimi Taoufik, Ait Hmazi Fouad, Majid Fatima

“…An increase in artificial crack length (a) resulted in a progressive decrease in the mechanical properties. Weibull analysis confirmed the presence of significant anisotropic behavior in 3D-printed PLA specimens, with ultimate stress (su0) values ranging from 39.82 MPa for the 90� orientation to 44.69 MPa for the 0� orientation, and elastic stress (se0) values from 35.49 MPa (90�) to 39.11 MPa (0�), indicating greater strength for the 0� oriented specimens. …”
Get full text

Optimization of Process Parameters of Friction Stir Welding by Taguchi Method by Azzam Sabah Albunduqee, Hussein R Al-Bugharbee

“…In welded joints the mechanical properties are affected by a number of mechanical properties of the joined materials and by the process parameters as well. …”
Get full text

Response of the ultra high performance concrete under dynamic compressive loading by Nela Krčmářová, Jan Falta, Tomáš Fíla, David Čítek

“… Ultra high performance concrete is a modern cementitious material which exhibits excellent mechanical properties such as damage tolerance, fracture toughness and durability. …”
Get full text

Nonlinear Finite Element Simulation of Friction Stir Processing of Marine Grade 5083 Aluminum Alloy by Emad Eldin KISHTA, Farid ABED, Basil DARRAS

“…As friction stir processing is emerging as a new technique for material enhancement, full understanding of the process has not been achieved yet. The resulting mechanical and microstructural properties are controlled by processing parameters like rotational and translational speeds. …”
Get full text

The sealing of fixed joints by A. P. Kushnir, Yu. S. Asadova

“…The estimation of deformations and forces in the contact zone was carried out taking into account the profile of surfaces, limit deviations of shape and location of surfaces, as well as physical and mechanical properties of materials of the sealed joint. …”
Get full text

Profiles of alkali concentration for changing process parameters in kraft impregnation of spruce chips by Michaela Peciarová, Peter Peciar, Martin Juriga, Štefan Gužela, Marian Peciar, Roman Fekete

Get full text

Effect of Excess Application of Nitrogenous Fertilizer on Postharvest Quality of Spinach during Storage by Naveen Kumar Mahanti, Subir Kumar Chakraborty, Pankaj B. Pathare

“…The TSS, pH, PLW, and mechanical properties degradation were higher with storage time for leaves that initially had a lower amount of nitrate content. …”
Get full text

Tunable methacrylated decellularized heart matrix: a versatile scaffold for cardiac tissue engineering by Valinteshley Pierre, Douglas H. Wu, Douglas H. Wu, Chao Liu, Elif Ertugral, Chandrasekhar Kothapalli, Samuel E. Senyo

“…However, DHM is challenged by weak mechanical properties that limit its utility to biomedical applications like tissue engineering. …”
Get full text

A novel heat transfer modeling methodology for regenerative cooling in liquid propellant rocket engines by T. Gândara, V. Costa, J. Dias

Get full text

Dvelopment and application of similar material for physical model test of an ultradeep foundation pit in round gravel strata by Yanhui Guo, Xipeng Ren, Shaoqian Liu, Xiaobing Fu, Guo Yuan, Guoyang Zhang, Yi Yang, Zhiquan Yang, Xiangyu Wang, Ming Ni

“…This study could provide reference and inspiration for the development of similar materials in gravel formations with weaker mechanical properties.…”
Get full text

Energy absorption capacity of NiTi lattice structure (1st report: Evaluation of stiffness and strength of the structure by considering the effective length of the strand) by Yuji ATAGO, Kuniharu USHIJIMA, Koichi TSUCHIYA

“…In this study, a method for evaluating the mechanical properties, specifically the initial stiffness and martensitic transformation onset stress, of NiTi lattice structures, Body Centered Cubic (BCC) and Rhombic Dodecahedral (RD) structures, under compressive loading was proposed. …”
Get full text

Vibration and Damping Analysis of Composite Fiber Reinforced Wind Blade with Viscoelastic Damping Control by Tai-Hong Cheng, Ming Ren, Zhen-Zhe Li, Yun-De Shen

“…Composite materials are increasingly used in wind blade because of their superior mechanical properties such as high strength-to-weight and stiffness-to-weight ratio. …”
Get full text

Effect of ethanol, propanol and butanol on karanja biodiesel with vegetable oil fuelled in a single cylinder diesel engine by B. Musthafa, B. Saravanan, M.A. Asokan, S. Devendiran, K. Venkatesan

Get full text

Selective Laser-Melted Alloy 625: Optimization of Stress-Relieving and Aging Treatments by Barbara Rivolta, Riccardo Gerosa, Davide Panzeri

“…It is already commonly used in its conventional form, but the additive manufacturing technology, despite its higher production costs and lower productivity, is becoming competitive because of its excellent mechanical strength. It is in fact significantly higher compared to the conventionally manufactured alloy whose properties are often limited by the difficulty in retaining a fine grain size during plastic deformation and heat treatment. …”
Get full text

Adhesion and friction patterns of CVD-grown monolayer flakes induced by vacancy-rich defect domains by Paolo Canepa, Ermes Peci, Michele Magnozzi, Hasret Ağırcan, Domenica Convertino, Stiven Forti, Camilla Coletti, Ornella Cavalleri, Maurizio Canepa, Renato Buzio, Francesco Bisio

“…We identify two domains named α and β with distinct mechanical properties, which are not apparent in morphological differences but mirror spatial variations of the optoelectronic properties. …”
Get full text

Effect of Screw Configuration on the Recyclability of Natural Fiber-Based Composites by Vlasta Chyzna, Steven Rowe, James Finnerty, Trevor Howard, Christopher Doran, Shane Connolly, Noel Gately, Alexandre Portela, Alan Murphy, Declan M. Devine, Declan Mary Colbert

“…The findings reveal that both PLA and PLA/BF composites retain their mechanical integrity through up to 5 cycles of mechanical recycling. …”
Get full text

Artificial nerve conduit for guiding peripheral nerve growth (cadaveric study) by A. G. Fedyakov, E. A. Nemets, O. N. Dreval, A. V. Gorozhanin, L. A. Sidneva, Z. H. Plieva, M. A. Razin, N. V. Perova, V. I. Sevastianov

“…However, the best composition of a nerve guide can be established after comparative preclinical study of the biocompatible and functional properties of hybrid material samples.Conclusion. The physical and mechanical properties of the investigated NGC samples made of hybrid biomaterials meet the technical requirements for implantable nerve conduits for surgical application.…”
Get full text

Dual Numbers Approach in Multiaxis Machines Error Modeling by Jaroslav Hrdina, Petr Vašík

Get full text

Chromatin compaction during confined cell migration induces and reshapes nuclear condensates by Jessica Z. Zhao, Jing Xia, Clifford P. Brangwynne

“…Abstract Cell migration through small constrictions during cancer metastasis requires significant deformation of the nucleus, with associated mechanical stress on the nuclear lamina and chromatin. …”
Get full text