Article
Materials Science, Multidisciplinary
Tingting Yu
Summary: This study presents atomistic simulations revealing that an increase in driving force may result in slower grain boundary movement and switches in the mode of grain boundary shear coupling migration. Shear coupling behavior is found to effectively alleviate stress and holds potential for stress relaxation and microstructure manipulation in materials.
COMPUTATIONAL MATERIALS SCIENCE
(2024)
Article
Materials Science, Multidisciplinary
Tingting He, Hongxian Xie, Gaobing Wei, Guang-Hong Lu
Summary: This study investigates the migration behavior of sigma 3{1121 incoherent twin boundaries (ITBs) and reveals its temperature dependence. The results show differences in migration behavior between copper and nickel, and identify a critical temperature to distinguish thermally activated and anti-thermally activated migration.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Gashaw B. Bizana, Luis A. Barrales-Mora
Summary: Classical theories assume a linear correlation between grain boundary curvature and velocity, but recent experimental observations suggest a more complex relationship in polycrystalline materials. Molecular dynamics simulations of nanosized polycrystalline Al annealing were used to determine the velocity and curvature of approximately 12,000 grain boundaries. The study revealed differences in kinetics behavior at the grain and grain-boundary levels, with a clear correlation between grain boundary curvature and migration direction. However, when considering all grain boundaries, the correlation between velocity and curvature was found to be low, indicating the complexity of grain boundary migration. Factors such as grain boundary character, defect distributions, and stress distribution between neighboring grains were found to influence grain boundary migration behavior.
Article
Engineering, Mechanical
Anping Hua, Junhua Zhao
Summary: Studies have found that the change in shear direction can cause a transition from grain boundary migration to sliding in nanocrystalline metals. This transition is caused by the competition between the nucleation energies of disconnection and surface step.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Engineering, Mechanical
Chuanlong Xu, Xiaobao Tian, Wentao Jiang, Qingyuan Wang, Haidong Fan
Summary: This study investigates the migration mechanisms of symmetric tilt grain boundaries (STGBs) in magnesium using molecular dynamic simulations. The results show that the migration mechanisms of grain boundaries are significantly influenced by their structure, with small angle STGBs migrating through twin nucleation and growth, large angle STGBs migrating through the glide of grain boundary dislocations, and medium angle STGBs transforming into twin boundaries through the emission of lattice dislocations/stacking faults.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Chemistry, Multidisciplinary
Sheng Qian, Yifeng Ni, Yi Gong, Fan Yang, Qi Tong
Summary: This study finds that using a gradient nanograined structure can enhance the damping capacity of metals. The GB orientations in the gradient grains can facilitate GB sliding, thus increasing the damping capacity. This structure can also maintain the level of material strength and achieve a synergy of strength, ductility, and damping.
Article
Materials Science, Multidisciplinary
Akarsh Verma, Oliver K. Johnson, Gregory B. Thompson, Ian Chesser, Shigenobu Ogata, Eric R. Homer
Summary: This study examines non-Arrhenius grain boundary migration, referred to as antithermal migration, in an incoherent twin & sigma;3 [111] 60 degrees (11 8 5) nickel grain boundary. Molecular dynamics simulations are used to investigate the effect of various factors on migration, and a classical model for grain boundary migration is employed to analyze the results. The findings reveal that the migration mechanisms of the grain boundaries exhibit low apparent barrier heights and show similarities in behavior across different interatomic potentials.
Article
Materials Science, Multidisciplinary
Pauline Simonnin, Daniel K. Schreiber, Blas P. Uberuaga, Kevin M. Rosso
Summary: Grain boundary diffusion and metal mobility in alloys play a crucial role in material performance. Through molecular dynamics simulations, it was found that atomic diffusion within grain boundaries is much faster than in the bulk, exhibiting typical Arrhenius behavior. The diffusion of chromium is faster in the bulk but slower in grain boundaries due to the formation of high cohesive energy clusters. Additionally, the temperature-dependent grain boundary migration is significantly influenced by the alloying element.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Anping Hua, Junhua Zhao, Jian Zhang, Peishi Yu, Ning Wei, Wanlin Guo
Summary: The reversibility of the representative Sigma 11(113) grain boundary migration in copper bicrystals under cyclic shear strongly depends on their grain sizes, with a transition mechanism from fully reversible disconnection-mediated migration to irreversible structural damage. The study also developed a refined disconnection model considering grain size to predict migration behavior and interpret the forming mechanism of disconnection pair grooving (DPG).
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Engineering, Mechanical
Qishan Huang, Qingkun Zhao, Haofei Zhou, Wei Yang
Summary: Grain boundaries play a crucial role in the mechanical behaviors of nanocrystalline materials, and their deformation mechanisms are closely related to grain boundary misorientation. In this study, the relationship between grain boundary misorientation and deformation mechanisms was investigated through large-scale molecular dynamic simulations in face-centered cubic metals. An energetic model was developed to predict the critical grain boundary misorientation at which grain boundary sliding surpasses grain boundary migration.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Haofei Zhou, Panpan Zhu, Wei Yang, Huajian Gao
Summary: In this study, a new type of configurational force, called the gradient Eshelby force, is reported to drive the motion of twinning partial dislocations and cause detwinning in gradient nanotwinned metals. Molecular dynamics simulations validate the proposed mechanism, demonstrating the important role of Eshelby force in controlling twinning glide and twin boundary migration.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Amirreza Kazemi, Shengfeng Yang
Summary: The influence of dopants on grain boundary migration depends on the character of the grain boundary, with some showing negligible effect and others exhibiting a strengthening effect. The atomic-level mechanisms of grain boundary migration were identified for both pure aluminum and magnesium-doped aluminum alloys.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Hongyu Chen, Lin Wang, Feng Peng, Qiu Xu, Yaoxu Xiong, Shijun Zhao, Kazutoshi Tokunaga, Zhenggang Wu, Yi Ma, Pengqi Chen, Laima Luo, Yucheng Wu
Summary: This paper addresses the issue of hydrogen isotope retention of tungsten in nuclear fusion reactors. Experimental and simulation methods were used to investigate the effects of temperature, grain number, grain boundary density, and crystal orientation on hydrogen retention. The results show that grain boundaries play an important role in hydrogen retention, and an increase in grain boundary density leads to more significant hydrogen retention.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Ankur Chaurasia, Avinash Parashar
Summary: This study investigates the effect of hexagonal boron nitride nanosheets on the thermal transport properties of high density polyethylene based nanocomposites using experimental and atomistic simulation approaches. The results show that adding boron nitride nanosheets can improve the thermal conductivity of polyethylene, with bi-crystalline BNNS demonstrating superior reinforcing capabilities.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Materials Science, Multidisciplinary
Genchun He, Chao Xu, Chunmei Liu, Huaping Liu
Summary: This study systematically investigated the effect of symmetrical (001) tilt grain boundaries on the hardness of diamond and revealed that the misorientation angle plays a crucial role, with smaller angles leading to hardness enhancement. For misorientation angles smaller than 36.87°, plastic deformations are mainly caused by dislocation propagation, while for larger angles, it is mainly through atomic disordering mode.
MATERIALS & DESIGN
(2021)
Article
Materials Science, Ceramics
Yongfeng Zhang, Evan D. Hansen, Tim Harbison, Sean Masengale, Jarin French, Larry Aagesen
Summary: The research shows that there is significant grain boundary (GB) energy anisotropy in UO2 and CeO2, which is associated with the cubic symmetry of the fluorite structure. The anisotropy of GB energy is not only dependent on crystal structure, but also on ionic bonding. These findings provide important data and knowledge for GB engineering to improve nuclear fuels.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Yipeng Gao, Andrea M. Jokisaari, Larry Aagesen, Yongfeng Zhang, Miaomiao Jin, Chao Jiang, Sudipta Biswas, Cheng Sun, Jian Gan
Summary: The effects of elastic anisotropy on the symmetry of void superlattices in cubic metals were studied. The results show that elastic anisotropy can lead to either face-centered cubic or simple cubic superlattices depending on the Zener anisotropy ratio. The study suggests that diffusion anisotropy could be the dominant mechanism for symmetry selection during the formation of irradiation-induced void superlattices.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Aashique A. Rezwan, Daniel Schwen, Yongfeng Zhang
Summary: This study presents a modeling investigation on concurrent grain growth and radiation-induced segregation (RIS) in austenitic Fe-Cr-Ni. The results show that grain growth significantly affects RIS in terms of increasing grain size and motion of grain boundaries as defect sinks. Additionally, RIS in nanocrystalline materials induces grain-level compositional redistribution, resulting in grain-size-dependent compositions in individual grains. These findings highlight the different effects of RIS in nanocrystalline alloys compared to coarse-grained counterparts.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Multidisciplinary Sciences
Pratik Murkute, Kofi Oware Sarfo, Isak McGieson, Melissa K. Santala, Yongfeng Zhang, Liney Arnadottir, Julie D. Tucker, O. Burkan Isgor
Summary: The study found that the thermal aging time significantly affects the electrochemical properties of duplex stainless steels, with the electrolyte chemistry playing a crucial role in the corrosion behavior. Corrosion resistance decreases with increasing thermal aging time for all DSS alloys, chloride addition leads to pitting corrosion, and the presence of dissolved oxygen significantly increases corrosion rate.
SN APPLIED SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Anton Schneider, Yongfeng Zhang, Chao Jiang, Jian Gan
Summary: The formation mechanism of void and gas bubble superlattices has been investigated, showing a correlation with the instability in the vacancy concentration field and self-interstitial-atom diffusion. Experimental results indicate that the superlattice constant, ordering, and critical dose of formation are strongly dependent on temperature and dose rate.
Article
Materials Science, Multidisciplinary
Benjamin Beeler, Yongfeng Zhang, A. T. M. Jahid Hasan, Gyuchul Park, Shenyang Hu, Zhi-Gang Mei
Summary: This study presents molecular dynamics simulations of the formation energy of point defects under applied stress. This work is crucial for implementing stress-dependent microstructural evolution models of nuclear fuels to ensure the reliability and predictability of research reactor fuels.
Article
Materials Science, Multidisciplinary
Xueyang Wu, Iman Abdallah, Wen Jiang, Robert S. Ullberg, Simon R. Phillpot, Adrien Couet, John H. Perepezko, Michael R. Tonks
Summary: An electrochemical phase-field model is used to investigate the oxidation mechanisms of the 21-2N valve stainless steel alloy exposed to carbon dioxide at 973 K. The model includes three observed oxide phases: Mn3O4, Cr2O3, and MnCr2O4. The sensitivity of oxidation processes to diffusion mobilities is examined and the oxidation rate is calibrated against experimental data. It is found that both inward oxygen and outward metal diffusion are important for oxidation, and the order of initial oxide layers impacts the diffusion of Mn.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Shuaifang Zhang, Wen Jiang, Kyle A. Gamble, Michael R. Tonks
Summary: In this study, the importance of bubble pressure on fuel fragmentation in UO2 polycrystals during LOCA accidents was investigated using 2D phase field fracture simulations. The results show that crack nucleation and propagation accelerate when unpressurized intergranular voids with a radius of 1 μm exist in the polycrystals under LOCA conditions.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Claire Griesbach, Tyler Gerczak, Yongfeng Zhang, Ramathasan Thevamaran
Summary: TRISO nuclear fuel particles have a layered spherical shell designed to retain fission products, but failure often occurs in the porous pyrocarbon buffer layer. Detailed characterization of the buffer porosity and its heterogeneous distribution is necessary to understand the failure mechanisms. In this study, FIB-SEM tomography was used to reconstruct the buffer microstructure with high spatial resolution. The analysis revealed an overall porosity of around 14% and an increase in local porosity towards the inner pyrocarbon layer. This information provides insight into the process-structure-property-performance relations of TRISO fuel particles and can inform the prediction of particle failure under irradiation.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Chaitanya Vivek Bhave, Guiqiu Zheng, Kumar Sridharan, Daniel Schwen, Michael R. Tonks
Summary: In this study, an electrochemical phase-field model is developed to capture the microstructure-dependent corrosion of structural alloys in molten salts. The model is validated using 1D, 2D, and 3D simulations and predicts the corrosion rate proportional to the average grain size at the alloy/salt interface.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Correction
Materials Science, Multidisciplinary
Benjamin Beeler, Yongfeng Zhang, A. T. M. Jahid Hasan, Gyuchul Park, Shenyang Hu, Zhi-Gang Mei
Article
Materials Science, Multidisciplinary
Andrew K. Hoffman, Yongfeng Zhang, Maalavan Arivu, Li He, Kumar Sridharan, Yaqiao Wu, Rinat K. Islamgaliev, Ruslan Z. Valiev, Haiming Wen
Summary: In nuclear reactor environments, nanocrystalline 304 stainless steel exhibits unique radiation-induced segregation behavior with the enrichment of Cr at grain boundaries. Lattice-based atomic kinetic Monte Carlo simulations reveal the influences of grain size, injected interstitials, and self-ion injection on grain boundary segregation.
Article
Materials Science, Multidisciplinary
Zefeng Yu, Elizabeth Kautz, Hongliang Zhang, Anton Schneider, Taeho Kim, Yongfeng Zhang, Sten Lambeets, Arun Devaraj, Adrien Couet
Summary: This study investigates the radiation effects on Zr-0.5Nb alloy and suggests a mechanism based on oxide space charge modification resulting from irradiation enhanced Nb clustering. This mechanism is supported by experimental and modeling approaches at multiple scales, challenging the current understanding of irradiation effects and their potential for improving materials performance in extreme environments.
Article
Materials Science, Multidisciplinary
Xueyang Bognarova, Wen Jiang, Daniel Schwen, Michael R. Tonks
Summary: The Kim-Kim-Suzuki (KKS) method is a commonly used multi-phase multi-component phase-field (PF) method that decouples interfacial energy from bulk energy and solves concentration as the conserved variable. There are two approaches to numerically solving the KKS method: the global solution approach (GSA) and the local solution approach (LSA). This study compares the performance of LSA and GSA in solving four increasingly complex KKS models using the finite element method and the MOOSE framework. The results show that LSA and GSA produce similar solutions with a maximum difference of only 0.34%. LSA has fewer degrees of freedom, requires less memory, and has shorter wall time compared to GSA. The savings in memory and wall time increase with higher mesh density and are more pronounced in models with higher dimensionality and more nodes. However, GSA is easier to implement and is better suited for highly nonlinear systems with sophisticated solvers.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Fidelma G. Di Lemma, Daniele Salvato, Luca Capriotti, Walter J. Williams, Fei Teng, Yongfeng Zhang, Tiankai Yao
Summary: Despite previous research providing substantial fuel performance data, the development of U-Zr metallic nuclear fuel for fast spectrum reactors is hindered by a lack of mechanistic understanding of fuel behavior evolution under thermal irradiation conditions. In this study, in-situ transmission electron microscopy heating experiments were conducted to investigate phase and microstructural evolution in several unirradiated U-10Zr specimens. The results showed that the α-U + bcc-(Zr, U) eutectic microstructure began to decompose above 600 degrees C, with decomposition initiating from the bcc (U,Zr) phase. Similar results were observed for specimens fabricated by different routes. The impact of observed microstructure and phase evolutions on fuel fabrication and in-pile fuel transient tests was also discussed.
JOURNAL OF NUCLEAR MATERIALS
(2023)
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.