Article
Nanoscience & Nanotechnology
Tianjiao Lei, Mingjie Xu, Jungho Shin, Daniel S. Gianola, Timothy J. Rupert
Summary: Unique nanorod precipitates with a core-shell structure are found to nucleate from the grain boundaries of a bulk nanocrystalline Al-Ni-Y alloy. The local structure and chemistry of these features during annealing are studied. As annealing time increases, more nanorods transform to an ordered structure while the shell chemistry transitions from Y-rich to Ni-rich. The correlation between the nanorods and amorphous complexions is observed.
SCRIPTA MATERIALIA
(2022)
Review
Materials Science, Multidisciplinary
Ricardo H. R. Castro
Summary: This paper presents the role of interfacial energies in understanding and controlling nanocrystalline complex oxides, and the intentional modification of interfacial energies through ionic doping. It introduces a new perspective on systematically understanding the role of interfacial energies in microstructural control, especially in nanocrystalline processing.
CURRENT OPINION IN SOLID STATE & MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Malik Wagih, Christopher A. Schuh
Summary: Solute segregation at grain boundaries is crucial for stabilizing nanocrystalline alloys. A spectral approach has been developed to more accurately screen for thermodynamic stability in polycrystalline structures, considering the anisotropic nature of grain boundaries, and the results are generally consistent with experimental observations.
Article
Materials Science, Multidisciplinary
Sayantan Mondal, Amlan Dutta
Summary: This study presents a strategy based on Bayesian optimization to produce simulated nanocrystalline samples by minimizing the relative error between the computed and targeted grain boundary energy. Analysis of the optimized samples reveals that an increase in the average grain boundary energy primarily results from an increase in the fractions of grain boundary atoms with very low and very high free volumes.
Article
Materials Science, Multidisciplinary
Nutth Tuchinda, Christopher A. Schuh
Summary: Grain boundary segregation is crucial for stabilizing nanocrystalline alloys, and this study provides quantitative detail on two previously unelaborated grain size dependencies in Al(Mg) binary alloy. The findings reveal that changes in grain size affect the segregation behavior of solutes in the spectrum occupied by intergranular segregation sites, and the presence of higher-order grain junctions also contributes to grain size dependence.
Article
Materials Science, Multidisciplinary
Xuefeng Lu, Wei Zhang, Junqiang Ren, Qing Gao, Hongtao Xue, Fuling Tang, Peiqing La, Xin Guo
Summary: Grain boundary movement is closely related to plastic deformation of materials. In this study, the introduction of carbon atoms formed a highly stable carbon chain network, which greatly enhanced the stability of the grain boundaries and showed strong dislocation pinning capability. The results revealed that an appropriate amount of carbon content increased the yield strength and tensile strength, while excessive carbon content inhibited the generation of dislocations and resulted in a decline in the mechanical properties of the alloy. This research provides a new strategy for grain boundary engineering by introducing non-metallic atoms.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Christopher A. Schuh, Ke Lu
Summary: Two major strategies, grain-boundary alloying and achieving low-energy crystallographic grain-boundary structures, have led to effective and implementable stable nanocrystalline materials, pointing to many directions for future advancements in the field.
Article
Nanoscience & Nanotechnology
Jonathan Kong, Terry J. H. Li, Elizabeth A. McNally, Jonathan L. McCrea, Jane Y. Howe, Uwe Erb
Summary: The coefficient of thermal expansion (CTE) of electroformed nanocrystalline Ni-32at%Co macro-defect free sheet metal can be divided into three regions up to 500 degrees C. Below 185 degrees C, the CTE is similar to its polycrystalline counterpart. Between 185 and 310 degrees C, the CTE plateaus and then decreases above 310 degrees C due to volume shrinkage induced by different grain growth stages. The grain boundary excess volume (BEV) was determined to be between 0.20-0.24 nm. Moreover, digital caliper measurements were proven to be a reliable technique for estimating BEV in specimens with grain boundaries as the main defect.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
D. Scheiber, J. Svoboda, F. D. Fischer, H. J. Boehm, L. Romaner
Summary: For designing new and improved materials, it is necessary to predict the kinetics of precipitation and segregation. However, there is currently no available modeling approach that combines precipitation with ab initio segregation data. In this study, we propose a mathematical model that describes segregation and precipitation kinetics using grain boundary segregation energies obtained from ab initio simulations. The model is rigorously implemented and validated using experimental data on a Fe-Au system from literature.
Article
Chemistry, Multidisciplinary
Wei Zhang, Xuefeng Lu, Junqiang Ren, Junchen Li, Hongtao Xue, Fuling Tang, Xin Guo
Summary: Solute element segregation behavior significantly affects the mechanical properties and deformation mechanism of nanocrystals. By using molecular dynamics, we investigated the effect of segregation structure on the deformation mechanism of NiCoAl nanocrystalline. The results reveal that complete segregation of Al within the grain leads to poor grain boundary stability and ineffective hindrance of dislocation movement, resulting in inferior mechanical properties. However, when 4% of Al transitions to the grain boundary, the stability improves significantly, generating lamination structures that effectively strengthen the nanocrystals.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Lei Wang, Reza Darvishi Kamachali
Summary: The study discusses the phase-like behavior of grain boundaries in materials and the role of grain boundary phase diagrams in predicting segregation and phase changes. A density-based model for grain boundary thermodynamics is developed, incorporating elastic energy to explain solute segregation phenomenon, with implications for Al-Cu and Al-Cu-Mg alloy systems. The elastic energy is found to significantly affect grain boundary solubility and segregation behavior, revealing a segregation transition in these alloy systems.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Eisuke Miyoshi, Munekazu Ohno, Yasushi Shibuta, Akinori Yamanaka, Tomohiro Takaki
Summary: By utilizing a novel framework, this study proposes a method to measure anisotropic grain boundary energy and mobility from observations of grain growth. Numerical tests demonstrate that the method accurately estimates these properties even under conditions of strong anisotropy and grain rotation. The results show the potential of this method in extracting a large dataset of grain boundary properties from actual grain growth observations.
MATERIALS & DESIGN
(2021)
Article
Nanoscience & Nanotechnology
Zuoyong Zhang, Chuang Deng
Summary: In this study, atomistic simulations are used to investigate the effects of hydrostatic pressure on the grain boundary segregation energy spectra in binary alloy systems. The results show that hydrostatic pressure can either enhance or hinder grain boundary segregation tendencies, depending on the alloy system. In certain alloys, such as AlMg and NiNb, hydrostatic pressure can also lead to transitions in the preferred segregation sites, characterized by an initial increase followed by a decrease at certain pressures. These transitions can be attributed to the changes in the elastic component brought about by hydrostatic pressure, which dominate the total segregation energy.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Charlette M. Grigorian, Timothy J. Rupert
Summary: In this study, the stability of amorphous complexions in Cu-based alloys was investigated, showing enhanced stability of the amorphous complexion structure in the Cu-Zr-Hf alloy compared to the Cu-Zr alloy. Time-temperature-transformation diagrams were constructed for amorphous-to-ordered complexion transition, revealing a critical cooling rate three orders of magnitude slower in the ternary alloy compared to the binary alloy.
Article
Materials Science, Multidisciplinary
H. X. Xue, X. C. Cai, B. R. Sun, X. Shen, C. C. Du, T. T. Yang, S. W. Xin, T. D. Shen
Summary: Bulk nanocrystalline W-Ti alloys with improved sinterability and superior mechanical properties were synthesized under high-temperature/high-pressure conditions, showing enhanced grain boundary strengthening compared to conventional W alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Multidisciplinary
Lijun Cao, Chao Hou, Fawei Tang, Shuhua Liang, Junhua Luan, Zengbao Jiao, Chao Liu, Xiaoyan Song, Zuoren Nie
Summary: The improvement of high-temperature mechanical properties of W-Cu based composites was achieved through the combined effects of solid solution, dispersed nano-precipitation, and highly stabilized nanostructure in the W-Cu-Cr-ZrC composite. The high thermal stability of the nanostructure endowed the composite with a compressive strength of 1150 MPa at 900 degrees C, approximately four times higher than that of the binary coarse-grained W-Cu composite. The crucial role of microstructural stability of the W phase skeleton in the overall strength of the W-Cu based composites was revealed.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Multidisciplinary
Tielong Han, Chao Hou, Zhi Zhao, Xintao Huang, Fawei Tang, Yurong Li, Xiaoyan Song
Summary: This study achieved improved copper connectivity and uniformly dispersed ultrafine tungsten particles in ultrafine grained (UFG) W-Cu composites. The as-prepared UFG W-Cu composites showed enhanced combination of hardness, compressive strength and electrical conductivity compared with previous reports. The strengthening mechanisms of the presented W-Cu composites were quantitatively discussed.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Jinyang Luo, Chao Hou, Fawei Tang, Tielong Han, Yurong Li, Junhua Luan, Zengbao Jiao, Xiaoyan Song, Zuoren Nie
Summary: This paper successfully fabricated a bimetallic nanocrystalline composite by replacing the refractory phase with a multi-principal refractory high-entropy phase. The interfacial configurations and compositional inter-diffusion between immiscible metals were investigated, and the mechanical properties and high-temperature performance of the composite were evaluated. The results showed improved properties compared to the traditional counterpart, suggesting promising potential for designing advanced immiscible metallic composites.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
K. Guo, H. Lu, G. J. Xu, D. Liu, H. B. Wang, X. M. Liu, X. Y. Song
Summary: This article reviews the development of nanocrystalline Sm-Co magnets and introduces the latest research progress and technologies. Through experimental and modeling studies, strategies for the preparation and performance improvement of nanocrystalline Sm-Co magnets are proposed.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Physical
Zhi Zhao, Yupeng Shan, Haibin Wang, Hao Lu, Xuemei Liu, Bowen Wang, Xiaoyan Song
Summary: This study developed a water-resistant hydrogel soil stabilizer inspired by mussel byssal. The hydrogel showed excellent toughness and ultra-low swelling ratio, allowing for its use in both dry and wet conditions. Soils strengthened with this hydrogel maintained great strength in both air and water, with good permeability and water retention capability.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Tielong Han, Chao Hou, Yaochuan Sun, Yurong Li, Xiaoyan Song
Summary: In this study, an ultrafine-grained W-Cu composite was fabricated using electroless plating and spark plasma sintering. The wear resistance and high-temperature compressive properties were investigated and compared with a commercial coarse-grained counterpart. The results show that the ultrafine-grained W-Cu composite exhibits superior mechanical performance, suggesting its potential as an alternative to commercial W-Cu composites.
Article
Nanoscience & Nanotechnology
Wentao Jiang, Hao Lu, Jinghong Chen, Lei Luo, Xuemei Liu, Haibin Wang, Xiaoyan Song
Summary: This study proposes an approach for toughening ceramic-based composites by modulating strain partition and stress distribution in phase-boundary regions. The concept of homogenizing lattice strain based on collective lattice shear is introduced to achieve high fracture toughness in ceramic-based composites. The feasibility of this strategy is demonstrated using ZrO2-containing WC-Co ceramic-metal composites. The crystal planes along the WC/ZrO2 martensitic transforming phase boundaries exhibit significantly larger and uniform lattice strains compared to conventional dislocation pile-up phase boundaries, enabling the composite to have high fracture toughness and hardness simultaneously. The homogenizing lattice strain strategy proposed in this study is applicable to a broad range of ceramic-based composites to achieve superior comprehensive mechanical properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Inorganic & Nuclear
Xuyang Yuan, Xuean Chen, Weiqiang Xiao, Xiaoyan Song
Summary: A new rare-earth orthoborate Ba2CdSm2(BO3)4 was synthesized using the high temperature molten salt method and its crystal structure was determined. It exhibits a complex three-dimensional framework composed of distorted polyhedra and planar tri-angles, with open channels hosting Ba2+ and Ba2+/Sm3+ cations. The compound shows orange-red emission under near-UV excitation and has stable luminescent properties at elevated temperature.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Engineering, Multidisciplinary
Chao Hou, Hao Lu, Zhi Zhao, Xintao Huang, Tielong Han, Junhua Luan, Zengbao Jiao, Xiaoyan Song, Zuoren Nie
Summary: The challenge of fabricating nanostructured W-Cu composites has been solved by modulated phase separation. By using intermediary Al, a hierarchically nanostructured W-Cu composite with stable interfaces and high mechanical performance has been achieved.
Article
Engineering, Multidisciplinary
Maobao Xu, Xuemei Liu, Hao Lu, Haibin Wang, Zhi Zhao, Chao Hou, Tielong Han, Xiaoyan Song
Summary: This work was supported by the National Key R & D Program of China (2022YFB3708800) and the National Natural Science Foundation of China (92163107, 52271085, 52101003, 52171061, 52101031).
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Xingwei Liu, Haibin Wang, Hao Lu, Xuemei Liu, Zhi Zhao, Chao Hou, Lin Gu, Xiaoyan Song
Summary: A new type of grain-interior planar defect was discovered in TiC doped cemented tungsten carbides. The monolayers of metal atoms exist stably in ceramic grains, induced by ordered heteroatoms on specific crystal planes. The composition, structure, and crystallography of the planar defects were characterized, and their energy state and stability were evaluated. Tailoring the distribution density of the planar defects can enhance the mechanical properties of materials.
ADVANCED POWDER MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xuean Chen, Jinyuan Zhang, Weiqiang Xiao, Xiaoyan Song
Summary: A new mixed metal borate, CdTbGaB2O7, was synthesized and its crystal structure was determined. It belongs to a new member of the melilite family and has a 3D framework consisting of alternating tetrahedral layers and cationic layers interconnected via bridges. CdTb1-xSmxGaB2O7 solid solutions were also prepared. The materials showed color-tunable phosphorescence, making them potential candidates for UV w-LEDs.
Article
Chemistry, Physical
Shuqing Zhang, Sitong Huo, Xiaoyan Song, Xinping Zhang
Summary: Exfoliation of two-dimensional magnetic materials from non-vdW materials has become a topic of increased interest for the construction of 2D magnetic materials. Few-layer samples of non-vdW magnetic chromium tellurides, which possess high Curie temperatures, show promising applications in spintronics. The termination of the surface structures of few-layer chromium tellurides by either Cr or Te atoms remains under debate. Surface and exfoliation energy calculations reveal that the stability of the structures depends greatly on the chemical potential of Te atoms, and the few-layer sample with a Cr-terminated surface is easier to exfoliate than the one with both Te-terminated surfaces. Furthermore, the atomic number ratio of Cr to Te and the average magnetic moment of Cr atoms in few-layer samples can be used to identify different exfoliated structures.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xuean Chen, Ruru Bian, Weiqiang Xiao, Xiaoyan Song
Summary: The crystal structure and photoluminescence properties of a new rare-earth oxyborate compound were investigated. By doping Eu3+ ions, tunability of luminescence color was achieved.
DALTON TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
Shuqing Zhang, Fawei Tang, Xiaoyan Song, Xinping Zhang
Summary: Understanding the phase-transition processes of van der Waals (vdW) materials is crucial for controlling their performance and developing their applications. In this study, we investigate the structural transitions and Raman identifications of the monoclinic and orthorhombic phases of the layered vdW magnet CrI2. Our first-principles calculations reveal that each phase has a specific Raman spectrum, providing a reliable method to identify them. Additionally, the orthorhombic phase of CrI2 exhibits both ferroelectricity and magnetism simultaneously due to its unique interlayer stacking order, indicating its potential as a platform for sliding ferroelectricity and multiferroicity.
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.
