Article
Materials Science, Ceramics
Victor V. Lozanov, Aleksei Utkin, Tatyana A. Gavrilova, Anatoly T. Titov, Anatoly Beskrovny, Gleb A. Letyagin, Galina Romanenko, Natalya Baklanova
Summary: A variety of ternary Hf-Ir-B phases were formed at elevated temperatures through the reaction between iridium and hafnium diboride, including solid solutions and newly discovered ternary phases. These borides exhibit high hardness and their thermal expansion coefficients were studied.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Thuan Dinh Nguyen, Gregory D. Scofield, Sunghwan Hwang, Michael D. Sangid, Grigorios Itskos, Mario Caccia, Kenneth H. Sandhage
Summary: In this study, the oxidation behavior of SiC/Si composites at 750 degrees Celsius in CO2 and air was examined, revealing the formation of thin SiO2 scales in both gases without any detectable oxide formation at the SiC/Si interfaces. The weight gains were minimal, with a significantly lower rate of weight gain observed in CO2 compared to air. The SiO2 scales formed on SiC were thinner than those formed on Si, and the SiO2 scales on Si in air were thicker than in CO2, while the SiO2 scales on SiC were of similar thickness in both air and CO2.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Biochemistry & Molecular Biology
Ilzira A. Minigalieva, Yuliya V. Ryabova, Ivan G. Shelomencev, Lev A. Amromin, Regina F. Minigalieva, Yuliya M. Sutunkova, Larisa I. Privalova, Marina P. Sutunkova
Summary: We investigated the effects of Fe2O3 nanoparticles on the brain structure and function in rats. Electron microscopy revealed the presence of Fe2O3 nanoparticles in the olfactory bulb tissues but not in the brain's basal ganglia. We observed an increase in axons with damaged myelin sheaths and pathologically altered mitochondria in the exposed animals' brains. Our findings suggest that Fe2O3 nanoparticles can have a toxic effect on the central nervous system even at low doses.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
J. L. Snider, T. M. Mattox, Y-S Liu, L. F. Wan, P. Wijeratne, M. D. Allendorf, V Stavila, B. C. Wood, L. E. Klebanoff
Summary: LiH significantly improves the hydrogenation of MgB2, lowering the temperature and without forming undesirable intermediates, while TiH2 is essentially inert when mixed with MgB2 during high-pressure hydrogenation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Lunchao Zhang, Yuan Yuan, Jun Wang, Tao Chen, Jingfeng Wang, Fusheng Pan
Summary: High temperature heat treatment Mg-0.69Sn-0.69Y alloy exhibited a high damping capacity (0.201 at epsilon=1 x 10-3) and a very low critical strain amplitude at room temperature (epsilon cr1=2.97 x 10-5), which can be ascribed to the combined effects of purified matrix phase and subgrain interfaces. The substructure is unstable and the damping capacity decreases with temperature increment.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Yunhe Zheng, Laure Bourgeois, Jian-Feng Nie
Summary: This study investigated the structure of precipitates in Mg-Zn-Al alloys, revealing new structural features and proposing that the rod-shaped precipitates can be described by tiling of different shapes.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Cheng Liu, Xiaohua Yang, Jianchao Peng, Bin Liu, Qun Luo, Qian Li, Kuo-Chih Chou
Summary: The deformation behaviors of a dual-phase Mg alloy containing α-Mg and 18R-LPSO phases were investigated in this study. The 18R phase, accounting for 11.3 vol.%, contributed to 23.0% of the overall alloy deformation. The coordinated twinning deformation of α-Mg matrix through the slip of basal dislocations and the kinking deformation of Mg slices induced by the 18R phase were observed during the early stage of deformation. At the end of deformation, a large number of T2-type stacking faults were generated, improving the ductility of the alloy. This work provides a novel strategy for designing high-strength and good ductility dual-phase Mg alloys.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Biomedical
Diana C. Martinez, Anna Dobkowska, Romy Marek, Hanna Cwieka, Jakub Jaroszewicz, Tomasz P. Plocinski, Crtomir Donik, Heike Helmholz, Berengere Luthringer-Feyerabend, Berit Zeller-Plumhoff, Regine Willumeit-Roemer, Wojciech Swieszkowski
Summary: This study investigated the degradation of an Mg-0.45Zn-0.45Ca (ZX00) screw in vitro and in vivo. The results showed that the ZX00 alloy promoted bone healing and the formation of new bone. Despite the correlation with the production procedure, the ZX00 alloy was still suitable for temporary bone implants.
BIOACTIVE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
J. Hargreaves, S. Moore, G. Yuan, D. Liu, H. Tipping, R. Abbott, J. Tufnail, H. Dawson, T. L. Martin
Summary: In this study, the microstructure of novel laser-keyhole Eurofer 97 welds was modeled using finite element thermal analysis and precipitate kinetics modeling. Microanalysis techniques such as scanning electron microscopy and high-speed atomic force microscopy were performed on representative specimens, revealing the presence of large void defects in the weld fusion zone.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
J. L. Snider, T. M. Mattox, Y-S Liu, L. F. Wan, P. Wijeratne, M. D. Allendorf, V Stavila, B. C. Wood, L. E. Klebanoff
Summary: The study reveals that LiH/MgB2 and TiH2 have different effects on the hydrogen storage properties of MgB2, with LiH/MgB2 showing higher reactivity in the surface and near-surface regions, while TiH2 does not significantly aid MgB2 hydrogenation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Dhananjay Dubey, Kondababu Kadali, Harikrishna Kancharla, Anuz Zindal, Jayant Jain, K. Mondal, Sudhanshu S. Singh
Summary: The study found that using different aging temperatures affects the distribution and volume fraction of Mg17Al12 precipitates in AZ80 magnesium alloy, as well as the corrosion behavior of the alloy. Lower aging temperature results in higher corrosion resistance, which is correlated with the number density of Mg17Al12 precipitates.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Jinsun Liao, Yukiyo Miyawaki
Summary: The atmospheric corrosion resistance of a diecast Mg-Al-Ca-Si alloy was found to be better than that of a wrought AM60 alloy through long-term field exposure and electrochemical tests. The continuous intermetallic phases in the diecast alloy inhibit corrosion propagation, resulting in higher corrosion resistance.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Nanoscience & Nanotechnology
Jiaxiang Wang, Xin Wang, Kehang Yu, Timothy J. Rupert, Subhash Mahajan, Enrique J. Lavernia, Julie M. Schoenung, Irene J. Beyerlein
Summary: The study investigates the effect of Y concentration on slip and twinning mechanisms in binary Mg-Y alloys. Increasing Y concentration reduces the intensities of the initial and deformation textures, as well as plastic anisotropy, tension-compression asymmetry, and twinning. The model suggests that increased Y concentration increases the critical resolved shear stress for basal slip and reduces plastic anisotropy, leading to enhanced non-basal activity in Mg-Y alloys.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Metallurgy & Metallurgical Engineering
Shuhui Lv, Qiang Yang, Fanzhi Meng, Jian Meng
Summary: This study investigates the instantaneous reactions of Al, Mn, Zn, Zr, and Y with Ni to understand their mechanisms in removing Ni impurity. The results reveal the formation of Al4NiY and Al4Ni(Y,Zr) intermetallic phases, which efficiently remove Ni and settle at the bottom of the melt. Adding Y to Mg-Al based alloys also contributes to the removal of Fe and Ni, improving the alloys' corrosion resistance and strength.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Environmental Sciences
K. Kayalvizhi, N. M. Alhaji, D. Saravanakkumar, S. Beer Mohamed, K. Kaviyarasu, A. Ayeshamariam, Amal M. Al-Mohaimeed, Mohamed Ragab AbdelGawwad, Mohamed S. Elshikh
Summary: This study investigated the adsorption behavior of biomaterial activated Sawdust-Chitosan nanocomposite beads on Ni (II) and Cu (II) ions removal from aqueous solutions. The structural analysis and surface morphology were evaluated using PXRD, TEM, and EDAX techniques, while the functional groups behavior was discussed using FTIR technique. The adsorption properties were determined using isotherm models and the maximum adsorption capacity was inferred.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Shengchen Xue, Mike Sumption, Edward Collings
Summary: The study explores the inter-tape resistance in REBCO coated conductors through testing under different temperatures and pressures, revealing variations in contact efficiency. This helps to enhance our understanding of the performance parameters of coated conductors.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Engineering, Electrical & Electronic
Jacob Rochester, Cory Myers, Mike Sumption, Tengming Shen, Milan Majoros, E. W. Collings
Summary: In this study, magnetic measurements were conducted on a 17-strand Bi:2212 Rutherford cable using a Ni replacement calibration method, resulting in the calculation of an effective filament diameter and observation of magnetization values at 1 T on the shielding branch.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Physics, Applied
M. D. Sumption, J. P. Murphy, T. Haugan, M. Majoros, D. C. van der Laan, N. Long, E. W. Collings
Summary: Characteristics of CORC(R) and Roebel cables using ReBCO conductors were studied in a spinning magnet calorimeter. The losses of both cables were mainly composed of hysteresis losses, flux creep effects, and eddy current losses. The spiral geometry of the CORC(R) cables led to reduced losses.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Review
Oncology
Edward W. Collings, Lanchun Lu, Nilendu Gupta, Mike D. Sumption
Summary: The paper emphasizes the importance of proton or other charged particle therapy and provides an overview of the current systems and manufacturers worldwide. It compares the properties of photons, protons, and carbon ions for therapy and discusses the principles of particle beam handling and gantry design. The paper also highlights the potential of MRI image guidance in improving the accuracy of targeting and positioning in particle therapy.
FRONTIERS IN ONCOLOGY
(2022)
Article
Engineering, Electrical & Electronic
M. Majoros, M. D. Sumption, M. Parizh, F. Wan, M. A. Rindfleisch, D. Doll, M. Tomsic, E. W. Collings
Summary: This study presents the magnetic, mechanical, and thermal design of a whole-body MRI magnet with square cross-section coils, which can achieve comparable performance to the helium-cooled magnet through conduction cooling.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Thermodynamics
Danlu Zhang, Mike D. Sumption, Milan Majoros, Edward W. Collings, Dean Panik, Matt Rindfleisch, David Doll, Mike J. Tomsic
Summary: This study conducted a 3D finite element analysis simulation to investigate the temperature distribution and thermal properties evolution of superconducting magnets in MRI scanners. The results showed that at steady state, the maximum temperature difference within the coil was 5.1 K and the current margin was 12.75 A. Optimized current lead designs can reduce the temperature difference within the coil.
Article
Engineering, Electrical & Electronic
M. Majoros, M. D. Sumption, J. Rochester, X. Peng, D. Doll, M. Tomsic, E. W. Collings
Summary: This paper presents the results of a magnetic design study for a 7 T whole body MRI magnet using Nb3Sn conductor. The use of Nb3Sn conductor enables the development of short segmented coil designs and conduction cooled design. The study shows that a viable 7 T whole body MRI can be achieved using Nb3Sn conductor.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
Milan Majoros, M. D. Sumption, S. Xue, E. W. Collings
Summary: This paper discusses the current distribution and stability of high current superconducting cables in high field superconducting magnets. Finite element modeling is used to simulate tape-stack and CORC cables with broken elements of different sizes and intensities located at various positions in the coils. The results show that the stability of CORC cables can be controlled by modifying the size and thermal conductivity of their cores.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
M. Majoros, M. D. Sumption, E. W. Collings
Summary: Quench and protection in magnets wound with coated conductors are important for various applications, including high energy particle accelerators. Research indicates that using non-insulated coils may be more beneficial for improving magnet stability. Additionally, advantages and disadvantages of using Roebel and CORC cables in magnet windings have been discussed.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
S. Xue, M. D. Sumption, D. Panik, C. J. Thong, X. Guo, M. Majoros, E. W. Collings
Summary: Rare-earth barium copper oxide (REBCO) coated conductors are important materials for high performance cables and magnets. The control of current sharing between conductors is a critical challenge. The study found that surface modification techniques can reduce the inter-strand contact resistance and enhance current sharing.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
Thanatheepan Balachandran, Noah J. Salk, Dongsu Lee, M. D. Sumption, Kiruba S. Haran
Summary: Recent developments in low ac loss MgB2 conductors are important for the renewed interest in fully superconducting machines. Evaluating ac losses in fully superconducting machines is crucial for feasible designs. This paper proposes simplified methods to estimate the ac losses in conductors with non-uniform rotational applied magnetic fields experienced by the armature in a machine's environment.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Physics, Applied
F. Wan, M. D. Sumption, E. W. Collings
Summary: A series of monofilamentary powder-in-tube MgB2 wires were fabricated with 2 mol. % C doping and co-additions of 0-3 wt. % Dy2O3, showing improved irreversibility fields (mu H-0(irr)), upper critical fields (mu(0)Hc(2)), and transport critical currents. The addition of 1 wt. % Dy2O3 to already optimally C-doped MgB2 wires produced higher H-c2//ab, H-c2//c, and Hirr values at 4.2 K. C/Dy2O3 co-addition was found to be a more promising candidate for improving non-barrier J(c) of MgB2 at temperatures above 20 K, with increased critical current density (Jc) and intraband scattering.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
H. J. Kwon, J. Rochester, F. Wan, M. A. Rindfleisch, M. J. Tomsic, M. D. Sumption, E. W. Collings
Summary: Multifilamentary MgB2 strands (filament numbers 36 to 114) with 0, 2, and 3.2% carbon doping were prepared by the in-situ power-in-tube (PIT) method. These strands were tested for their J(c) and n-value at 4.2 K under magnetic fields up to 12 T. The heat treatments at 675℃ and 650℃, with the liquid-solid reaction, centered around the melting point of Mg (650℃). The J(c) (B) crossover effect was observed in a pair of strands with and without 2% C doping. The study focused on the dependence of J(c) on field strength, dopant concentration, cabling, and the dependence of n-value on field strength.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
S. Xue, J. Kwon, Y. Guo, T. Garg, M. D. Sumption, E. W. Collings
Summary: Rare earth barium copper oxide (REBCO) coated conductor tapes and cables are promising material candidates for constructing high field magnets. Compression tests were performed to analyze the mechanical behavior of commonly used tapes and cables. The results showed that the behavior could be characterized in three distinct regimes, with different moduli and stress limits for each regime.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Meeting Abstract
Oncology
A. Ben Ali, M. Majoros, X. Zhang, E. W. Collings, N. Gupta, M. D. Sumption, L. Lu
INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Y. Liu, K. Zweiacker, C. Liu, J. T. McKeown, J. M. K. Wiezorek
Summary: The evolution of rapid solidification microstructure and solidification interface velocity of hypereutectic Al-20at.%Cu alloy after laser melting has been studied experimentally. It was found that the formation of microstructure was dominated by eutectic, alpha-cell, and banded morphology grains, and the growth modes changed with increasing interface velocity.
Article
Materials Science, Multidisciplinary
Bharat Gwalani, Julian Escobar, Miao Song, Jonova Thomas, Joshua Silverstein, Andrew Chihpin Chuang, Dileep Singh, Michael P. Brady, Yukinori Yamamoto, Thomas R. Watkins, Arun Devaraj
Summary: Castable alumina forming austenitic alloys exhibit superior creep life and oxidation resistance at high temperatures. This study reveals the mechanism behind the enhanced creep performance of these alloys by suppressing primary carbide formation and offers a promising alloy design strategy for high-temperature applications.
Article
Materials Science, Multidisciplinary
Jian Song, Qi Zhang, Songsong Yao, Kunming Yang, Houyu Ma, Jiamiao Ni, Boan Zhong, Yue Liu, Jian Wang, Tongxiang Fan
Summary: Recent studies have shown that achieving an atomically flat surface for metals can greatly improve their oxidation resistance and enhance their electronic-optical applications. Researchers have explored the use of graphene as a covering layer to achieve atomically flat surfaces. They found that high-temperature deposited graphene on copper surfaces formed mono-atomic steps, while annealed copper and transferred graphene on copper interfaces formed multi-atomic steps.
Article
Materials Science, Multidisciplinary
Jennifer A. Glerum, Jon-Erik Mogonye, David C. Dunand
Summary: Elemental powders of Al, Ti, Sc, and Zr are blended and processed via laser powder-bed fusion to create binary and ternary alloys. The microstructural analysis and mechanical testing show that the addition of Ti results in the formation of primary precipitates, while the addition of Sc and Zr leads to the formation of fine grain bands. The Al-0.25Ti-0.25Zr alloy exhibits comparable strain rates to Al-0.5Zr at low stresses, but significantly higher strain rates at higher stresses during compressive creep testing. Finite element modeling suggests that the connectivity of coarse and fine grain regions is a critical factor affecting the creep resistance of the alloys.
Article
Materials Science, Multidisciplinary
P. Jannotti, B. C. Hornbuckle, J. T. Lloyd, N. Lorenzo, M. Aniska, T. L. Luckenbaugh, A. J. Roberts, A. Giri, K. A. Darling
Summary: This work characterizes the thermo-mechanical behavior of bulk nanocrystalline Cu-Ta alloys under extreme conditions. The experiments reveal that the alloys exhibit unique mechanical properties, behaving differently from conventional nanocrystalline Cu. They do not undergo grain coarsening during extrusion and exhibit behavior similar to coarse-grained Cu.
Article
Materials Science, Multidisciplinary
Yiqing Wei, Jingwei Li, Daliang Zhang, Bin Zhang, Zizhen Zhou, Guang Han, Guoyu Wang, Carmelo Prestipino, Pierric Lemoine, Emmanuel Guilmeau, Xu Lu, Xiaoyuan Zhou
Summary: This study proposes a new strategy to modify microstructure by phase regulation, which can simultaneously enhance carrier mobility and reduce lattice thermal conductivity. The addition of Cu in layered SnSe2 induces a phase transition that leads to increased grain size and reduced stacking fault density, resulting in improved carrier mobility and lower lattice thermal conductivity.
Article
Materials Science, Multidisciplinary
Jia Chen, Zhengyu Zhang, Eitan Hershkovitz, Jonathan Poplawsky, Raja Shekar Bhupal Dandu, Chang-Yu Hung, Wenbo Wang, Yi Yao, Lin Li, Hongliang Xin, Honggyu Kim, Wenjun Cai
Summary: In this study, the structural origin of the pH-dependent repassivation mechanisms in multi-principal element alloys (MPEA) was investigated using surface characterization and computational simulations. It was found that selective oxidation in acidic to neutral solutions leads to enhanced nickel enrichment on the surface, resulting in reduced repassivation capability and corrosion resistance.
Article
Materials Science, Multidisciplinary
X. Y. Xu, C. P. Huang, H. Y. Wang, Y. Z. Li, M. X. Huang
Summary: The limited slip systems of magnesium (Mg) and its alloys hinder their wide applications. By conducting tensile straining experiments, researchers discovered a rate-dependent transition in the dislocation mechanisms of Mg alloys. At high strain rates, glissile dislocations dominate, while easy-glide dislocations dominate at low strain rates. Abundant glissile dislocations do not necessarily improve ductility.
Article
Materials Science, Multidisciplinary
M. S. Szczerba, M. J. Szczerba
Summary: Inverse temperature dependences of the detwinning stress were observed in face-centered cubic deformation twins in Cu-8at.%Al alloy. The detwinning stress increased with temperature when the pi detwinning mode was involved, but decreased when the pi/3 mode was involved. The dual effect of temperature on the detwinning stress was due to the reduction of internal stresses pre-existing within the deformation twins. The complete reduction of internal stresses at about 530 degrees C led to the equivalence of the critical stresses of different detwinning modes and a decrease in the yield stress anisotropy of the twin/matrix structure.
Article
Materials Science, Multidisciplinary
Taowen Dong, Tingting Qin, Wei Zhang, Yaowen Zhang, Zhuoran Feng, Yuxiang Gao, Zhongyu Pan, Zixiang Xia, Yan Wang, Chunming Yang, Peng Wang, Weitao Zheng
Summary: The interaction between the electrode and the electric double layer (EDL) significantly influences the energy storage mechanism. By studying the popular alpha-Fe2O3 electrode and the EDL interaction, we find that the energy storage mechanism of the electrode can be controlled by modulating the EDL.
Article
Materials Science, Multidisciplinary
Matthew R. Barnett, Jun Wang, Sitarama R. Kada, Alban de Vaucorbeil, Andrew Stevenson, Marc Fivel, Peter A. Lynch
Summary: The elastic-plastic transition in magnesium alloy Mg-4.5Zn exhibits bursts of deformation, which are characterized by sudden changes in grain orientation. These bursts occur in a coordinated manner among nearby grains, with the highest burst rate observed at the onset of full plasticity. The most significant burst events are associated with twinning, supported by the observation of twinned structures using electron microscopy. The bursts are often preceded and followed by a stasis in peak movement, indicating a certain "birth size" for twins upon formation and subsequent growth at a later stage.
Article
Materials Science, Multidisciplinary
Vaidehi Menon, Sambit Das, Vikram Gavini, Liang Qi
Summary: Understanding solute segregation thermodynamics is crucial for investigating grain boundary properties. The spectral approach and thermodynamic integration methods can be used to predict solute segregation behavior at grain boundaries and compare with experimental observations, thus aiding in alloy design and performance control.
Article
Materials Science, Multidisciplinary
Feiyu Qin, Lei Hu, Yingcai Zhu, Yuki Sakai, Shogo Kawaguchi, Akihiko Machida, Tetsu Watanuki, Yue-Wen Fang, Jun Sun, Xiangdong Ding, Masaki Azuma
Summary: This study reports on the negative and zero thermal expansion properties of Cd2Re2O7 and Cd1.95Ni0.05Re2O7 materials, along with their ultra-low thermal conductivity. Through investigations of their structures and phonon calculations, the synergistic effect of local structure distortion and soft phonons is revealed as the key to achieving these distinctive properties.
Article
Materials Science, Multidisciplinary
Thomas Beerli, Christian C. Roth, Dirk Mohr
Summary: A novel testing system for miniature specimens is designed to characterize the plastic response of materials for which conventional full-size specimens cannot be extracted. The system has an automated operation process, which reduces the damage to specimens caused by manual handling and improves the stability of the test results. The experiments show that the miniature specimens extracted from stainless steel and aluminum have high reproducibility, and the results are consistent with those of conventional-sized specimens. A correction procedure is provided to consider the influence of surface roughness and heat-affected zone caused by wire EDM.
Article
Materials Science, Multidisciplinary
Rani Mary Joy, Paulius Pobedinskas, Nina Baule, Shengyuan Bai, Daen Jannis, Nicolas Gauquelin, Marie-Amandine Pinault-Thaury, Francois Jomard, Kamatchi Jothiramalingam Sankaran, Rozita Rouzbahani, Fernando Lloret, Derese Desta, Jan D'Haen, Johan Verbeeck, Michael Frank Becker, Ken Haenen
Summary: This study investigates the influence of film microstructure and composition on the Young's modulus and residual stress in nanocrystalline diamond thin films. The results provide insights into the mechanical properties and intrinsic stress sources of these films, and demonstrate the potential for producing high-quality nanocrystalline diamond films under certain conditions.
