Article
Materials Science, Multidisciplinary
Kuebra Duman, Sencer Suereyya Karabeyoglu, Pasa Yaman
Summary: Hot work tool steels are commonly used in the hot extrusion of aluminum alloys. Nitriding is a widely accepted surface hardening method in the aluminum extrusion industry, providing improved wear resistance and deformation resistance. This study investigated the effects of different nitriding conditions on hardness, tensile and impact properties, wear behavior, and coefficient of friction. It was found that longer nitriding time resulted in thicker diffusion layers, altering the wear mechanism to abrasive wear and increasing friction resistance. However, tensile properties decreased due to the notch effect of the diffusion layer.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Zejia Zhao, Yexiang Fu, Suet To, Guoqing Zhang, Jianjun Lin
Summary: This paper investigates the effect of material microstructural on the wear of single crystal diamond tools during ultraprecision turning of difficult-to-cut Ti6Al4V alloys. The results show that the flank face of Ti6Al4V workpiece has more adhesion than the rake face, and the tool wear is less in turning of the lamellar alloy compared to the equiaxial and bimodal alloys, resulting in low cutting forces and high surface quality. The wear mechanism of the diamond tool is discussed from the perspectives of wear modes and chemical reactions.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Materials Science, Coatings & Films
Seyyed Saber Mirhosseini, Farzad Mahboubi
Summary: This study investigates the synergic effect of nano-diamond (ND) addition and plasma nitriding (PN) treatment on the tribological and structural properties of nickel-boron (NiB) coatings. The results show that increasing the concentration of NDs leads to a transformation in the structure of the coatings, resulting in higher hardness and wear resistance. The NiB/0.5ND coating exhibits the highest hardness value and wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Jianbiao Du, Hanzhong Liu, Ning Yang, Xiaozhou Chen, Wenjun Zong
Summary: This paper investigates the use of modified diamond tools (MDT) by focused ion beam (FIB) in the dry single-point diamond turning (DSPDT) process for Al6061 alloy. The results show that MDT reduces cutting forces, produces smoother machined surfaces, and has lighter wear compared to unmodified diamond tools. The improved cutting performance of MDT is attributed to the reduced surface energy of modified diamonds and the changes in C-C bond energy and bond length. Applying MDT in the DSPDT of Al6061 alloy is feasible and promising for carbon neutralization manufacturing.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Coatings & Films
Christian Micallef, Yuri Zhuk, Adrianus Indrat Aria
Summary: Precision-engineered components often require hard coatings to improve functional properties. Single point diamond turning was used to machine CVD WC coatings with a hardness of 1120HV, achieving an Ra of 0.2μm.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Crystallography
Pablo Alfredo Ruiz-Trabolsi, Alexis Chino-Ulloa, Jose Guadalupe Miranda-Hernandez, Raul Tadeo-Rosas, Rafael Carrera-Espinoza, Julio Cesar Velazquez, Enrique Hernandez-Sanchez
Summary: This study compares the tribological behavior of surface layers obtained through three different hardening processes. It finds that boride layers exhibit the highest wear resistance, while carburized layers experience the greatest volume loss. The research also identifies abrasive wear as the main mechanism in all samples and highlights that the coefficient of friction is not always directly related to the wear process.
Article
Materials Science, Multidisciplinary
Limin Feng, Jiannan Hu, Sen Yan, Zheqiu He, Junjie Shi, Jianzhong Li
Summary: Diamond-like carbon (DLC) coatings were deposited on high-speed steel using the principle of hollow cathode and plasma enhanced chemical vapor deposition (PECVD). The effects of experimental parameters on the adhesion and wear behavior of the coatings were systematically investigated. It was found that the nitrogen content influenced the deposition speed and structure of the DLC coatings, with an increase in nitrogen content leading to changes in sp3 bond content and friction coefficient. By combining plasma nitriding treatment for the substrate, the wear resistance of DLC coatings was effectively improved by optimizing the hardness gradient. The mechanistic-based model revealed that the resistance provided by nitriding layers played a key role in resisting deformation.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Physical
Qiang Lin, Sulin Chen, Zhe Ji, Zhewei Huang, Zhinan Zhang, Bin Shen
Summary: This study uses reactive molecular dynamics to investigate the atomistic diffusion mechanism of diamond into titanium. It is found that carbon atoms diffuse into titanium at nanoscale temperature, with diffusion intensifying at higher temperatures. Dangling atoms and sp-bonded carbon phases play critical roles in initiating and promoting the diffusion process. The diffusivity of carbon atoms in diamond is layer-dependent due to unique phase composition and activation energy for self-diffusion. The study also provides an effective activation energy for interfacial diffusion from diamond to titanium.
SURFACES AND INTERFACES
(2022)
Article
Engineering, Mechanical
H. Kovaci, Y. B. Bozkurt, A. F. Yetim, O. Baran, A. Celik
Summary: This study conducted a comprehensive analysis on the corrosion and tribocorrosion behavior of untreated and duplex ceramic coated AISI 4140 steel. The nitriding treatment increased surface roughness, but the negative impact on corrosion and tribocorrosion performance decreased with an increase in ceramic film thickness. Harder surfaces contributed to improved wear resistance, and the coatings acted as a barrier, delaying the arrival of corrosive liquid to the base material.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Alexey Vereschaka, Catherine Sotova, Filipp Milovich, Anton Seleznev, Nikolay Sitnikov, Semen Shekhtman, Vladimir Pirogov, Natalia Baranova
Summary: Ti-TiN-(Y,Ti,Al)N coatings with different yttrium contents were studied, and their wear resistance and oxidation behavior were analyzed. Coatings with higher yttrium content showed better wear resistance but were more prone to oxidation. Nanolayers with high aluminum and yttrium contents were more susceptible to structural changes during oxidation.
Article
Nanoscience & Nanotechnology
Wendi Li, Yuxin Liang, Yang Bai, Tiesong Lin, Bangsheng Li, Zhiqiang Fu, Jicai Feng
Summary: Single point diamond turning (SPDT) can create nanoscale surface roughness and surface nanograins, and when heated through spark plasma sintering (SPS), copper processed by SPDT achieved diffusion bonding at an ultra-low temperature of -202 degrees C (0.35 Tm). Ultimately, high-strength (-269 MPa) diffusion bonding of copper was accomplished by SPDT and SPS.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Manufacturing
Jianpeng Wang, Yufeng Wen, Junhong Han, Shuai Ma, Guoqing Zhang
Summary: Ferrous materials are widely used in the mold industry due to their excellent properties. However, they are considered difficult-to-cut materials for diamond turning. This study proposes a novel assisted method based on a magnetic field to suppress the wear of polycrystalline diamond (PCD) tools. Experimental results show that the magnetic field-assisted machining can reduce the flank wear of PCD tools by 30.6%.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2022)
Article
Engineering, Industrial
Z. P. Cui, G. Li, H. Z. Liu, W. J. Zong, H. J. Zhang, C. Y. Zhang, K. Du
Summary: In this study, the wear law of diamond tool in machining of oxygen-free copper is investigated, considering the anisotropy of diamond strength. The cutting stress distribution on the tool face is calculated, revealing higher stress near the flank face. The strength distribution of the tool cutting edge is modeled, indicating significant differences in strength at different positions due to the anisotropy of diamond crystal. The results provide insights into the wear mechanism of diamond tools and facilitate the estimation of tool wear in oxygen-free copper machining.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
M. Godec, B. Podgornik, A. Kocijan, C. Donik, D. A. Skobir Balantic
Summary: The study aims to investigate the properties of plasma-nitrided 18Ni-300 maraging steel and the influence of heat treatment on this process. The results show that prior heat treatment can enhance the performance of maraging steel after nitriding.
SCIENTIFIC REPORTS
(2021)
Article
Materials Science, Multidisciplinary
Mariana Correa Rossi, Pedro Akira Bazaglia Kuroda, Larissa Solano de Almeida, Luciana Sgarbi Rossino, Conrado Ramos Moreira Afonso
Summary: This study aims to improve the microhardness and wear properties of as-cast titanium samples (CP-Ti, Ti-Al-4V, and TNZ-33) by creating a hard surface through plasma nitriding. The presence of nitrides was evaluated using XRD, and the microstructure and chemical composition were analyzed using electron microscopy and EDS. Plasma nitriding resulted in the formation of TiN on CP-Ti, TiN and Ti2N on Ti-6Al-4V, and TiN and ZrN on TNZ-33. The hardness of all materials significantly increased after nitriding, and the wear properties were improved.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
