Article
Engineering, Mechanical
Guisen Liu, Kaitao Wu, Ping Yu, Xianhao Cheng, Jiaqing Shi, Changqing Ye, Yong Mao, Yao Shen
Summary: In this study, a void-dislocation interaction model was developed within the framework of dislocation dynamics and implemented in open-source DD software ParaDiS. The model was used to investigate the hardening effects of randomly-distributed voids with different sizes and number densities. The results showed that the average resistance by voids with various sizes is proportional to the 2/3 power of total number density. A modified Friedel-Kroupa-Hirsch (MFKH) model was proposed to quantify the hardening effects of nanometric voids, and it was verified by comparing with experimental data on neutron-irradiated tungsten samples.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Chemistry, Multidisciplinary
Ruo-Yao Zheng, Wu-Rong Jian, Irene J. Beyerlein, Wei-Zhong Han
Summary: Tungsten exhibits high strength in extreme environments, but irradiation hardening limits its service life. Research suggests that ultra-high irradiation hardening in tungsten mainly originates from atomic-scale hidden point-defect complexes.
Article
Engineering, Mechanical
Kaitao Wu, Guisen Liu, Ping Yu, Changqing Ye, Jiaqing Shi, Yao Shen
Summary: The article discusses the importance of developing irradiation hardening models for nuclear materials and proposes a VC-dislocation interaction model based on the dislocation dynamics method. The model is implemented in open-source software and used to investigate the hardening effect of varying size and number density of vacancy clusters. The simulation results show that the hardening effect is proportional to the 2/3 power of the total number density, and a modified hardening model is proposed to improve the accuracy of predicting VC-induced hardening in tungsten.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Weicheng Zhong, Tarik A. Saleh, Lizhen Tan
Summary: The study found that NF616 exhibits better swelling resistance and slightly higher number density of Ni-rich clusters under high-temperature irradiation conditions, while showing slightly lower radiation hardening. Compared to general T91, NF616 demonstrates better performance at 430 degrees Celsius.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Tatyana Fedyaeva, Santhosh Mathesan, Anuj Bisht, Zhao Liang, Dan Mordehai, Eugen Rabkin
Summary: Hemispherical nanoparticles of Ag-33 at.% Au and Ag-60 at.% Au alloys were fabricated by solid state dewetting of Ag-Au bilayers on a sapphire substrate. In-situ microcompression tests and atomistic molecular dynamics simulations revealed the plastic deformation behavior and the absence of solid solution hardening effect in the alloys.
Article
Materials Science, Multidisciplinary
Charles K. C. Lieou, Curt A. Bronkhorst
Summary: By using a partitioned-energy thermodynamic framework, constraints on the Taylor-Quinney coefficient in plastic deformation have been derived based on atomic configurational disorder. Finite-element analysis of experiments on aluminum alloy has shown good agreement between theory and experiment, with computed values of the Taylor-Quinney coefficient increasing with strain in different materials.
Article
Nanoscience & Nanotechnology
Nan Wang, Yongnan Chen, Gang Wu, Qinyang Zhao, Zhen Zhang, Lixia Zhu, Jinheng Luo
Summary: This study reveals the different contributions of geometrically necessary dislocation (GND) and statistically stored dislocation (SSD) to work hardening in dual-phase steel. By introducing high-density GND through pre-tensile loading-unloading-reloading (LUR) and high-density SSD through monotonic pre-tensile, it is found that the steel with high GND exhibits higher yield stress and stronger strain hardening ability compared to the high-SSD steel, even with almost the same total dislocation density.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Eun-Ae Choi, Yun Soo Lee, Sang Jin Lee, Jee Hyuk Ahn, Sung Hwan Lim, Satoshi Semboshi, Seung Zeon Han
Summary: Plastic deformation in metals occurs through the generation and movement of dislocations, which increase strength. This study observed the effect of dislocation configuration and reaction with grain boundaries on strength and discovered a hidden mechanism in work hardening.
METALS AND MATERIALS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Dan Sun, Jijun Zhao
Summary: The study developed a phase-field model to simulate the hardening effect of sessile loops in tungsten caused by neutron irradiation. Experimental observations showed that the size, spatial distribution, and amount of damage loops have a strong impact on their hindrance to dislocation glide. Furthermore, the location where edge dislocations glide through the damage loops significantly affects the hardening effect.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Pengcheng Zhu, Yajie Zhao, Yan-Ru Lin, Jean Henry, Steven J. Zinkle
Summary: This study investigates the effect of heavy-ion irradiation on radiation hardening in high-purity binary alloy Fe18Cr. Nanoindentation testing and high-quality TEM imaging were conducted to extract hardness and microstructure information. The strength factor was accurately calculated based on the detailed TEM characterization of irradiated microstructures, and a refined hardening superposition method was applied to quantify the mechanical properties of ion-irradiated materials.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Engineering, Mechanical
Shang Chen, Jiuxi Yuan, Shumin Wang, Luyao Mei, Jiaohui Yan, Lei Li, Qiuhong Zhang, Zhixi Zhu, Jin Lv, Yunfei Xue, Yankun Dou, Xiazi Xiao, Xun Guo, Ke Jin
Summary: Nanoindentation was used to evaluate the hardening effects of ion-irradiated pure V samples. The correlation between hardness and irradiation dose was established by considering the lateral spanning of the indenter. Crystal-plasticity finite-element-modeling simulation results and microstructural characterization showed the effectiveness of the measured hardening-dose correlation.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Xiu-Qun Wang, Wei-Zhong Han
Summary: Titanium (Ti) is highly sensitive to small amounts of oxygen, which significantly affects its mechanical properties. The presence of oxygen solutes leads to increased strength but decreased ductility in Ti alloys, limiting their processing and application. We have successfully addressed this issue by designing an oxygen-gradient in pure Ti, resulting in a unique combination of ultra-hardenability, high strength, toughness, and enhanced strain hardening rate. We propose a plausible mechanism for this oxygen-regulated plasticity in hexagonal Ti, involving twinning coordinating plasticity and oxygen-solute mediated dislocation slip. These findings provide an effective approach to optimize the mechanical performance of pure Ti.
Article
Materials Science, Multidisciplinary
A. Sendrowicz, A. O. Myhre, I. S. Yasnikov, A. Vinogradov
Summary: This study revisits the classical topic of elastic energy storage during strain hardening of metals from the perspective of an analytically tractable thermodynamic modelling framework. The model's versatility has been extended to predict energy partitioning during plastic flow. The obtained analytical solutions demonstrate good predictive capability and can be applied to other metals.
Article
Chemistry, Physical
Li Fu, Hualong Ge, Boning Zhang, Xuan Zhou, Lihua Ma, Lixian Zhu, Shaoping Lu, Bin Yuan, Junjie He, Yong Mao
Summary: This study investigates the microstructural evolution and the effects of discontinuous precipitation (DP) and ordering on the age-hardening behavior in Au-20Ag-30Cu ternary alloy. Experimental observations reveal that DP forms at grain boundaries consisting of alternating α1 and α2 phases, while L12-type AuCu3 ordered phase with nanometric spherical particles forms at grain interior and within the lamellar α1 phase of DP. Both DP and L12-type AuCu3 nanoprecipitates show growth with elevated aging temperature. DP at grain boundaries is found to have a detrimental effect on overall age-hardening, while the L12-type AuCu3 nanoparticles effectively impede the movement of dislocations to enhance age-hardening.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Nanoscience & Nanotechnology
Deping Zhang, Dongdong Zhang, Yaqin Zhang, Shanrong Chen, Tao Xu, Jian Meng
Summary: The ductile Mg-Yb based alloy shows better strain hardening ability and formability at room temperature compared to high-formable Mg alloys. The alloy exhibits four strain hardening stages labeled as stage I, II, III, and IV, different from the majority of Mg alloys, with stage II characterized by an increased strain hardening rate rather than plateau or decrease.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Long Zhao, Hongxiang Zong, Xiangdong Ding, Turab Lookman
Summary: Recent studies have shown unusual dislocation core structure and motion in complex concentrated alloys. This study investigates the dislocation structure behind a shock-wave front in bcc high-entropy alloys, revealing an anomalous 'extended' edge dislocation structure that can facilitate faster dislocation motion and deter the early nucleation of deformation twins. The unique dislocation structures are attributed to nanoscale chemical heterogeneities in high-entropy alloys.
Article
Materials Science, Multidisciplinary
Cheng Wen, Changxin Wang, Yan Zhang, Stoichko Antonov, Dezhen Xue, Turab Lookman, Yanjing Su
Summary: This study developed a relationship characterized by the electronegative difference of elements to represent solid solution strengthening, and proposed a more superior model for predicting the solid solution strength/hardness of high entropy alloys, thereby accelerating the alloy design process.
Article
Materials Science, Multidisciplinary
Zhonghua Li, Hong-Hui Wu, Junjie Li, Shihan Wang, Shiqiang Qin, Jingjin He, Chuanbao Liu, Yanjing Su, Lijie Qiao, Turab Lookman, Yang Bai
Summary: Hysteresis has an influence on the electrocaloric effect (ECE), affecting the reversibility of the ECE. In first-order phase transitions with hysteresis regions, a large ECE occurs, but the temperature span under zero field decreases with increasing electric field. In continuous electric field cycles, the thermal response of irreversible ECE decreases with subsequent changes in field, and electrical hysteresis loss leads to an increase in temperature.
Article
Materials Science, Multidisciplinary
Lei Ding, Yumei Zhou, Yangyang Xu, Pengfei Dang, Xiangdong Ding, Jun Sun, Turab Lookman, Dezhen Xue
Summary: In this study, it was found that the reversible adiabatic temperature change of shape memory alloys is proportional to the mechanical work released during unloading, allowing for the prediction of temperature change without caloric measurements. By tuning composition and thermo-mechanical treatment, Ti-Ni binary shape memory alloys with large temperature changes were achieved, attributed to grain refinement and internal stress fields.
Article
Chemistry, Physical
Weiren Wang, Xue Jiang, Shaohan Tian, Pei Liu, Depeng Dang, Yanjing Su, Turab Lookman, Jianxin Xie
Summary: This study introduces a natural language processing pipeline to extract chemical composition and property data from scientific literature, facilitating analysis and prediction of superalloys using a data-driven model. The accuracy of predictions was verified through synthesis and characterization of alloys, and a web-based toolkit was provided as an online open-source platform.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xuefei Tao, Yang Yang, Hongxiang Zong, Xiangdong Ding, Kaiyuan Yu, Turab Lookman, Jun Sun
Summary: Metastable engineering is used to dope conventional shape memory alloys (SMAs) in order to achieve ultralow hysteretic superelasticity. Large-scale molecular dynamic simulations demonstrate the influence of dopants on the phase transformation process of SMAs.
Article
Materials Science, Multidisciplinary
Pengfei Dang, Fan Ye, Yumei Zhou, Lei Ding, Jianbo Pang, Lei Zhang, Xiangdong Ding, Jun Sun, Sheng Dai, Turab Lookman, Dezhen Xue
Summary: A bulk polycrystalline alloy with nanocrystalline features and epitaxially related structures has been synthesized using cold-rolling and aging treatment, showing excellent elastocaloric cooling properties and fatigue characteristics at room temperature.
Article
Materials Science, Multidisciplinary
Deqing Xue, Ruihao Yuan, Yuanchao Yang, Jianbo Pang, Yumei Zhou, Xiangdong Ding, Turab Lookman, Xiaobing Ren, Jun Sun, Dezhen Xue
Summary: This study demonstrates the control of martensitic transformation to strain glass transition through defect doping, leading to a wide range of elastocaloric effect. Furthermore, an inverse elastocaloric effect is observed in strain glass alloy with a history of zero-field cooling. This research provides a design recipe for expanding the temperature range for a good elastocaloric effect.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Changxin Wang, Yan Zhang, Cheng Wen, Mingli Yang, Turab Lookman, Yanjing Su, Tong-Yi Zhang
Summary: There is a growing interest in using machine learning techniques to extract explicit relationships between material descriptors and target properties, such as band gap energy.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Lipeng Jiang, Xue Jiang, Changxin Wang, Pei Liu, Yan Zhang, Guocai Lv, Turab Lookman, Yanjing Su
Summary: This paper utilizes multi-objective optimization to discover a high-efficiency NIR phosphor Gd3Mg0.5Al1.5Ga2.5Ge0.5O12:0.04Cr3+, which exhibits broadband NIR emission, good thermal stability, and promising applications for NIR pc-LED. Machine learning models and an active learning strategy are employed to achieve efficient synthesis and characterization.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Physics, Applied
Yangyang Xu, Guomang Shao, Yumei Zhou, Yu Wang, Sen Yang, Xiangdong Ding, Jun Sun, E. K. H. Salje, Turab Lookman, Dezhen Xue
Summary: A ferroelectric phase transition in barium titanate single crystals under an external electric field is observed, showing scale invariant nucleation and growth of complex domain structures. The energy exponent varies with the external bias and cooling history, with the exponent being near 1.68±0.022 for a single-domain sample after field cooling and 1.66 for a multi-domain sample after zero field cooling under high fields. The complex domain patterns in the multi-domain sample hinder the movement of the phase boundary and generate more small energy signals, resulting in a high critical exponent. The aftershock time distribution remains the same for all switching conditions with Omori exponent near -1 and switching time correlations of -1±0.05 for short times and -2±0.10 for long times.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Guomang Shao, Yangyang Xu, Yumei Zhou, Xiangdong Ding, Jun Sun, E. K. H. Salje, Turab Lookman, Dezhen Xue
Summary: The avalanche dynamics of ferroelectric switching in lead zirconate titanate ceramics were investigated. Two distinct power-law regimes were identified, and the critical energy exponents were determined. The events were attributed to the depinning of domain walls from different types of defects.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Pengfei Dang, Yumei Zhou, Xiangdong Ding, Jun Sun, Turab Lookman, Dezhen Xue
Summary: There are critical challenges in applying shape memory alloys to solid-state refrigeration, with the degradation of elastocaloric response during repetitive loading being an outstanding issue. Refined grains or dispersed precipitates can improve elastocaloric stability in shape memory alloys by providing high resistance to dislocation activity during transformation.
SHAPE MEMORY AND SUPERELASTICITY
(2023)
Article
Chemistry, Physical
Weiren Wang, Xue Jiang, Shaohan Tian, Pei Liu, Turab Lookman, Yanjing Su, Jianxin Xie
Summary: This study introduces a semi-supervised text mining method to extract parameters related to the sequence of alloy synthesis and processing actions. By automatically extracting synthesis and processing actions from a large corpus of scientific texts, it is possible to improve the prediction model of the data-driven relationship between synthesis factors and structures.
NPJ COMPUTATIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Changxin Wang, Xiaoxu Wang, Tianyao Zhang, Ping Qian, Turab Lookman, Yanjing Su
Summary: This study investigates the potential of 2D metal carbide semiconductor, Ti2CO2, as an electrocatalyst for the hydrogen evolution reaction (HER). By anchoring single transition metal atoms on Ti vacancies, the catalytic activity and conductivity of Ti2CO2 can be tuned. The results identify Ti2CO2-W as a promising nonprecious HER electrocatalyst with excellent catalytic activity, conductivity, and stability. Machine learning methods are also applied to develop a physical descriptor for efficient searching of highly active HER catalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(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.
