Article
Nanoscience & Nanotechnology
Rijie Zhao, Tingting Yang, Yeqing Wang, Yang Ren, Jianrong Gao
Summary: The rapid solidification of intermetallic Ni3Sn compound from an undercooled liquid was studied, revealing the growth of ordered and disordered cubic solids at low and high undercooling, respectively. The disordered cubic solid was reordered after rapid solidification and underwent a solid-state transformation during cooling. High density crystal defects and nanodomains were observed in the transformed matrix, which were determined to be antiphase domains with chemical disorder through a HAADFSTEM study. These findings suggest the potential for online control of mechanical properties in additively manufactured intermetallics.
SCRIPTA MATERIALIA
(2021)
Article
Nanoscience & Nanotechnology
Tomoya Nagira, Terumi Nakamura, Fumiyoshi Yoshinaka, Takahiro Sawaguchi, Yasuhiro Aoki, Masayoshi Kamai, Hidetoshi Fujii, Akihisa Takeuchi, Masayuki Uesugi
Summary: In this study, the dendrite-scale microstructural evolution of Fe-Mn-Si alloys during TIG spot welding was observed using high-spatial resolution X-ray imaging and diffraction. The solidification mode was found to significantly influence the susceptibility to solidification cracking.
SCRIPTA MATERIALIA
(2022)
Article
Materials Science, Multidisciplinary
Yumin Wang, Zhongli Liu, Liang Qiao, Shuangming Li
Summary: By investigating the deviation angles of Ni-based single crystal superalloys using both RO-XRD and BRL-XRD techniques, it was found that the cutting direction significantly affects the deviation angle. The primary orientation angle is used to characterize inherent orientation changes and eliminate the effects of cutting direction in Ni-based single crystal superalloys. Additionally, two pairs of diffraction peaks can be observed in the RO-XRD pattern of Ni-based single crystal superalloys.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Zhiguo Zhang, Chuangnan Wang, Billy Koe, Christian M. Schleputz, Sarah Irvine, Jiawei Mi
Summary: High speed synchrotron X-ray imaging and ultrafast tomography were used to study the fragmentation and growth dynamics of dendritic microstructures in an Al-15%Cu alloy under ultrasound. The results showed that efficient dendrite fragmentation occurred due to the acoustic flow, with thermal perturbation remelting plus mechanical fracture and separation being the dominant mechanism, while acoustic flow fatigue impact and phase collision effects played a minor role. Ultrasound application in the early solidification stage for just 10 s led to a significant increase in dendrite fragment number.
Article
Materials Science, Multidisciplinary
Tomoya Nagira, Daisuke Yamashita, Masayoshi Kamai, Huihong Liu, Yasuhiro Aoki, Kentaro Uesugi, Akihisa Takeuchi, Hidetoshi Fujii
Summary: The study found that solidification cracking propagated at a temperature lower than the solidus temperature due to segregation of low melting-point components. The relationship between the solidification cracking propagation velocity and the solid fraction and strain rate at the weld bead led to a periodic change in the solidification cracking velocity.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Dandan Zhao, Fan Yang, Dirk Holland-Moritz, Matthias Kolbe, Thomas Buslaps, Jianrong Gao
Summary: By investigating the undercooling and solidification of Ti-Y melts with different compositions, it was found that the liquid-liquid phase separation, solidification sequence, and dendritic growth velocities are influenced by dynamic interactions between growing dendrites and droplets of a separated liquid. The phase-separated samples solidify into unique core-shell or island-and-sea-like structures, which can be attributed to the liquid-liquid phase separation and droplet-dendrite interactions during solidification.
Article
Materials Science, Multidisciplinary
L. Abou-Khalil, Z. Thompson, G. Reinhart, T. Stan, L. Sturz, G. Zimmermann, P. W. Voorhees, N. Mangelinck-Noel, H. Nguyen-Thi
Summary: Three-dimensional reconstruction of the microstructure of Al - 7 wt.% Si samples solidified in microgravity conditions on the International Space Station revealed that the number of dendrite fragments depends on the dendrite network configuration. Samples with multiple dendrites with different orientations had more fragments compared to samples with well-aligned dendrites. The highest number of fragments was found in the region corresponding to an incipient grain boundary where dendrites with different orientations compete, indicating that dendrite misorientation during solidification leads to the formation of dendrite fragmentation.
Article
Nanoscience & Nanotechnology
Jiajia Shen, Rita Goncalves, Yeon Taek Choi, J. G. Lopes, Jin Yang, N. Schell, Hyoung Seop Kim, J. P. Oliveira
Summary: This study establishes a correlation between welding process, microstructure, and mechanical properties, laying the foundations for the successful joining and application of welded joints based on high entropy alloys using low-cost arc-based welding technologies.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Jakub Toman, Darren C. Pagan, Peter Mullner, Markus Chmielus
Summary: The study demonstrates that additive manufacturing of magnetic shape-memory alloys allows for more diverse part designs and cost-effective production. By utilizing a moving laser spot with different process parameter combinations, epitaxial growth of Ni-Mn-Ga can be achieved, reducing grain content.
Article
Polymer Science
Xiang Shi, Pierre-Antoine Albouy, Pascale Launois
Summary: This study presents a different view that the evolution of X-ray patterns reflects changes in crystalline texture rather than polymorphism. This enables a quantitative description of X-ray fiber patterns but also highlights some fundamental structural issues.
Article
Chemistry, Physical
Chaoling Xu, Tim Wigger, Mohammed A. Azeem, Tito Andriollo, Soren Faester, Samuel J. Clark, Zhixuan Gong, Robert Atwood, Jean-Claude Grivel, Jesper H. Hattel, Peter D. Lee, Niels S. Tiedje
Summary: This study presents the first time-resolved synchrotron tomography combined with a high-temperature environmental cell for direct observation of the evolution of compacted graphite (CG) during repeated melting and solidification processes. The formation mechanisms of CG, such as nucleation, growth, development of branches, and interconnection of graphite particles, are identified and correlated with local microstructural variations. The direct visualization of the dynamic solidification process provides new insights into CG formation and guides the development of CG iron solidification models.
Article
Materials Science, Multidisciplinary
Xiaoliang Han, Ivan Kaban, Jiri Orava, Qi Cheng, Yong Hao Sun, Ivan Soldatov, Martin V. Zimmermann, Kaikai Song, Kornelius Nielsch
Summary: The crystallization behavior of Cu 47.5 Zr 48 Al 4 Co 0.5 metallic glass is investigated using various techniques, revealing the competition between different crystalline phases depending on heating rate and the role of Co alloying.
Article
Chemistry, Physical
Shuai Hao, Sohrab R. Daemi, Thomas M. M. Heenan, Wenjia Du, Chun Tan, Malte Storm, Christoph Rau, Dan J. L. Brett, Paul R. Shearing
Summary: Solid state batteries have a critical barrier to commercialization due to lithium penetration through the solid electrolyte, which is not yet fully understood. This study tracked the 3D morphological evolution of cracks with deposited lithium and found that lithium only partially filled the cracks.
Article
Chemistry, Physical
Hye Eun Lee, Hongil Jo, Min Hyung Lee, Kang Min Ok
Summary: Seven new rare earth tellurite nitrates have been synthesized without solvent, exhibiting different crystal structures with band gaps ranging from 3.6 to 4.4 eV. The compounds show distinct molecular structural features and have been characterized using various techniques including UV-vis spectroscopy and thermal analyses.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Shuo Wang, Zhipeng Guo, Jinwu Kang, Meishuai Zou, Xiaodong Li, Ang Zhang, Wenjia Du, Wei Zhang, Tung Lik Lee, Shoumei Xiong, Jiawei Mi
Summary: This paper studied the dynamics of multi-dendrite concurrent growth and coarsening of an Al-15 wt.% Cu alloy using a highly computationally efficient 3D phase field model and real-time synchrotron X-ray micro-tomography. The results indicated that the multi-dendrite coarsening mechanisms obey the Lifshitz-Slyozov-Wagner theory with a higher constant of n = 4.3.
Article
Materials Science, Coatings & Films
Behnam Dashtbozorg, Xiao Tao, Hanshan Dong
Summary: Active-screen plasma (ASP) has shown great potential as a versatile surface engineering solution for enhancing the properties of biopolymers and carbon-based materials. By introducing moieties, modifying chemical bonding, changing morphology, and improving wettability, ASP treatments can improve the biocompatibility of biopolymers and enhance the performance of carbon-based materials.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Polymer Science
Yana Liang, Xiaoying Li, Mauro Giorcelli, Alberto Tagliaferro, Costas Charitidis, Hanshan Dong
Summary: The modification of PAN-derived carbon fibres using ASP technology with gas mixtures resulted in a more than 30% improvement in the interfacial shear strength with epoxy substrate. The enhanced adhesion mechanisms were attributed to increased chemical bonding, improved surface hydrophilicity, and enhanced van der Waals bonding.
Article
Engineering, Manufacturing
A. K. Lakshminarayanan, S. Ramachandran, B. Rajabharathi, W. Mirihanage
Summary: Friction Stir Back Extrusion (FSBE) is being developed as a novel extrusion process for producing high strength ultrafine-grained tubes from various metallic alloys. A high-fidelity experimental methodology was developed to control the critical process parameters of the FSBE process for manufacturing high strength ZE41 magnesium alloy tubes. Through thorough experimental trials on ZE41 magnesium round rods, crucial parameters for producing highly reliable ZE41 tubes were determined, leading to defect-free high strength tubes with significant grain refinement.
JOURNAL OF MANUFACTURING PROCESSES
(2022)
Article
Nanoscience & Nanotechnology
Zhiyuan Jing, Weiling Guo, Helong Yu, Shaojun Qi, Xiao Tao, Yulin Qiao, Wei Zhang, Xiaoying Li, Hanshan Dong
Summary: In this study, a simultaneous approach to reducing, nitrogen doping and noble metals coating of graphene oxide (GO) using an active-screen plasma (ASP) technique is reported. By doping noble metals and a small amount of iron and chromium, reduction, nitrogen doping and noble metals coating can be achieved on graphene oxide, resulting in a significant improvement in its electrical properties.
Article
Materials Science, Multidisciplinary
Zhengyu Yan, Maria J. G. Guimarey, Khaled Parvez, Chaochao Dun, Oliver Read, Thomas Forrest, Jeffrey J. Urban, Amor Abdelkader, Cinzia Casiraghi, Wajira Mirihanage
Summary: Chemical exfoliation is a cost-effective and simple method for synthesizing graphene. In this work, we demonstrate the use of x-ray pair distribution function to study solution-processed graphene or other 2D materials with atomic resolution, directly in solution. The results confirm the production of single and few-layer graphene, and also reveal a considerable ring distortion caused by the interaction between solvent molecules and graphene nanosheets.
Article
Chemistry, Physical
Md Raju Ahmed, Wajira Mirihanage, Prasad Potluri, Anura Fernando
Summary: Formulating highly stable graphene-based conductive inks with consistent electrical properties over storage has been a challenge in wearable electronics. Two highly stable inks (CEG ink and CT ink) are prepared using different organic solvents, showing high stability and negligible variability in electrical properties even after two months. These inks are used to coat flexible substrates and create wearable e-textiles with significantly low sheet resistance that increases less than 15% over two months. These inks offer high productivity and reproducibility, making them effective for formulating graphene-based inks.
PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
(2023)
Article
Chemistry, Multidisciplinary
Md Raju Ahmed, Wajira Mirihanage, Prasad Potluri, Anura Fernando
Summary: An isophorone-based quaternary compound was synthesized to modify graphene without affecting its intrinsic properties. A dip and dry coating method was used to coat substrates, resulting in electronic textiles with low sheet resistance and good repeatability. This novel modification strategy shows strong potential for multifunctional applications in future wearable e-textiles.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Zhenxue Zhang, Mikdat Gurtaran, Xiaoying Li, Hio-Ieng Un, Yi Qin, Hanshan Dong
Summary: In this study, N-type and P-type BiTe-based thin films were deposited on silicon, glass, and Kapton HN polyimide foil using magnetron sputtering technique. The morphology, microstructure, and phase constituents of the thin films were characterized by SEM/EDX, XRD, and TEM. The electrical conductivity, thermal conductivity, and Seebeck coefficient were measured by an advanced in-plane test system. The power output (open-circuit voltage and electric current) of the thin films was measured at different temperature gradients using a custom-built apparatus. The impact of deposition parameters and the dimensions of the thin films on the power output were investigated to optimize the thin-film flexible TE device for thermal energy harvesting.
Article
Engineering, Manufacturing
Wenyou Zhang, Da Guo, Lin Wang, Catrin M. Davies, Wajira Mirihanage, Mingming Tong, Noel M. Harrison
Summary: The repeated heating-melting-cooling-solidification processes in laser beam powder bed fusion (PBF-LB) additive manufacturing result in complex thermal residual stress (RS) in manufactured parts. X-ray diffraction was used for nondestructive characterization and measurement of RS in Ti-6Al-4V square plates manufactured using six different scanning strategies. Computational modeling was employed to interpret the experimental stress measurement results. The research found that an inclined scanning strategy can reduce the average through-thickness RS by mitigating the non-uniform thermal profile and corresponding residual thermal stresses in successive layers of material. Among the strategies analyzed, the 45 degrees inclined 90 degrees rotation scanning showed the lowest RS. The research outcome can help optimize the process parameters of PBF-LB in order to minimize RS in metal parts.
ADDITIVE MANUFACTURING
(2023)
Review
Chemistry, Multidisciplinary
Samantha Newby, Wajira Mirihanage, Anura Fernando
Summary: Smart textiles are revolutionizing wearable technology by integrating supercapacitors, which offer high discharge rates, flexibility, and long life cycles. This paper explores the fabrication methods and materials used to create textile-based energy storage systems, as well as the remaining challenges.
Article
Materials Science, Multidisciplinary
Xiaoan Yang, G. M. A. M. El-Fallah, Qing Tao, Jun Fu, Chenlei Leng, Jenny Shepherd, Hongbiao Dong
Summary: Steel manufacturing is a complex process with numerous process parameters affecting the mechanical properties of final products. Machine learning models have been used to predict these properties, but interpretability is a challenge. This study uses iGATE to reduce input dimensions and successfully predict mechanical properties of hot-rolled steel plates.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
Jian Wang, G. M. A. M. El-Fallah, Zhenqian Wang, Hui Li, Hongbiao Dong, Qing Tao
Summary: This study focuses on enhancing the strength of low-carbon martensitic steel through the refinement of the prior austenite grain size. The results showed that ultra-rapid heating and heavy cold deformation resulted in an impressive tensile strength exceeding 2 GPa, along with a higher hardness. The study also investigated the effect of high-temperature holding time on the austenite phase.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Lu Yang, Saranarayanan Ramachandran, Axieh Bagasol, Qiyu Guan, Weiguang Wang, David J. Browne, Denis Dowling, Wajira Mirihanage
Summary: Laser powder bed fusion (LPBF) technology enables the production of metallic components without conventional design and manufacturing constraints. By reconstructing the as-solidified microstructure across the LPBF build volume, the initial solidification microstructure of Ti-6Al-4V alloy can be revealed, providing insights into the early stages of solidification. This approach also has the potential to explore solidification microstructure and defect formation in titanium alloys during additive manufacturing.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Textiles
Raju Ahmed, Samantha Newby, Wajira Mirihanage, Prasad Potluri, Anura Fernando
Summary: Recent advances in materials and nanotechnology have made it easier to integrate functional sensors into textiles, enabling the manufacturing of wearable health-monitoring devices. Graphene and other materials play a crucial role in this field, with both challenges and opportunities.
Article
Engineering, Biomedical
Abdalla M. Omar, Mohamed H. Hassan, Evangelos Daskalakis, Gokhan Ates, Charlie J. Bright, Zhanyan Xu, Emily J. Powell, Wajira Mirihanage, Paulo J. D. S. Bartolo
Summary: The use of biocompatible and biodegradable porous scaffolds is a common approach in tissue engineering. The design of the scaffolds, including pore size and shape, plays a significant role in their biological behavior. This study investigates the impact of scaffold architecture on biological performance using Computational Fluid Dynamics. The results suggest that anatomically designed scaffolds with a bone-like structure have better fluid flow conditions and improve biological performance compared to rectangular scaffolds.
JOURNAL OF FUNCTIONAL BIOMATERIALS
(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.
