Article
Materials Science, Multidisciplinary
Shuai Xu, Rui Cao, Junheng Gao, Yu Zhang, Haitao Zhao, Shuize Wang, Yuhe Huang, Guilin Wu, Honghui Wu, Chaolei Zhang, Xinping Mao
Summary: In this study, the microstructures and mechanical properties of interphase precipitation strengthening micro-alloyed steels were investigated. The addition of Cr was found to increase the yield strength without significant decrease of ductility. Thermodynamics analysis revealed that the addition of Cr led to grain refinement and decrease of sheet spacing of nanoprecipitates. Calculations showed that the decrease of interphase-precipitated carbides sheet spacing and the refinement of grain size were responsible for the strength enhancement of Cr microalloyed steel.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zhichao Yang, Dehui Zheng, Zhen Wang, Tingbin Liang, Shuangbao Wang
Summary: In this study, the configurations, formation process, and properties of the Cu-rich layer formed during TJE of Al alloys were revealed using aberration-corrected scanning TEM (STEM), STEM image simulations, and first-principles calculations. The results showed a new orientation relationship between the Cu-rich layer and Al matrix, and provided insights into the formation mechanisms of the Cu-rich layer and Cu diffusion zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jubert Pasco, Lu Jiang, Thomas Dorin, Ali Keshavarzkermani, Youliang He, Clodualdo Aranas Jr
Summary: The unique structure and solute distribution of CoCrMo alloys produced using Laser Powder Bed Fusion technique require custom heat-treating processes to achieve the targeted phase distribution and mechanical properties. This study investigates the phase transformation behavior and precipitate distribution of CoCrMo samples after aging heat treatment. The results show differences in phase fraction and nucleation sites between directly aged and solution heat-treated samples.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Zipeng Ma, Meng Zhou, Baohong Tian, Yi Zhang, Heng Li, Xu Li, Jin Zou, Haoyan Hu, Ke Jing, Yong Liu, Alex A. Volinsky
Summary: In this study, two electrical contact composites were prepared using the vacuum hot pressing sintering endo-oxidation method. The addition of Y2O3 had no negative effects on the electrical conductivity and hardness of the composites. Moreover, it reduced the welding force and arc energy, and improved the stability of the contacts.
MATERIALS CHARACTERIZATION
(2024)
Review
Engineering, Mechanical
Afzal Ahmed Soomro, Ainul Akmar Mokhtar, Hilmi B. Hussin, Najeebullah Lashari, Temidayo Lekan Oladosu, Syed Muslim Jameel, Muddasser Inayat
Summary: This research evaluates the current machine learning techniques for predicting burst pressure in oil and gas pipelines. The most commonly used models are artificial neural networks (ANN) and support vector machines (SVM), but there are still limitations. The datasets used in building these models are mostly experimental or numerical simulations, involving parameters such as pipe geometry and material. The analysis reveals limitations in data availability, accuracy, and validation, and suggests future collaborations and the development of more practical models.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Materials Science, Multidisciplinary
Ronit Roy, Adil Shaik, Matthew Topping, Fei Long, Mark R. Daymond
Summary: This study demonstrates the improvements in characterizing localized dislocation distribution using the HR-EBSD method compared to the conventional approach. Two extreme examples of deformation conditions were investigated to show the efficacy of HR-EBSD in identifying dislocations and subtle features. The direct correlation between slip bands and HR-EBSD estimated GNDs is also presented, enhancing the scope of this approach in identifying individual slip bands.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Wenshan Guo, Hui Zhang, Qingjun Zhou, Guangchun Xiao, Ning Guo, Wei Zhao, Gang Wang
Summary: The microstructures and corrosion resistance of TC11 components were significantly improved using a high-power, high-speed laser metal deposition (LMD) process and subsequent post-heat treatment, with greater improvements observed in the deposition direction. The significant improvement of corrosion resistance in the deposition direction is mainly due to the weakening of the charged galvanic corrosion effect between the non-interlayer zone and interlayer zone.
MATERIALS CHARACTERIZATION
(2024)
Article
Engineering, Mechanical
Yan Xi, Yu Yao, Penghao Chen, Jun Li, Haitao Wang, Hui Li
Summary: A three-dimensional numerical model is established to study the stress distribution of casing under multi-hole perforation. The variation rule and distribution characteristics of effective stress are analyzed, and an optimization scheme for perforation parameters is proposed. The research results provide practical reference for conducting perforation engineering operations and optimizing perforation parameters.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Materials Science, Characterization & Testing
Ronghua Xu, Raul Enrique Beltran-Gutierrez, Max Kaeding, Alexander Lange, Steffen Marx, Joern Ostermann
Summary: This study compares the signal response of four different couplant materials in acoustic emission analysis and ultrasonic testing, and analyzes their impact on the signal response of a piezoelectric sensor. The results indicate that acrylic adhesive pads and hot glue demonstrate more reliable signal transmission in certain frequency ranges, while honey and vaseline perform better in other frequency ranges. Acrylic adhesive pads and honey are considered the preferred couplant materials.
NDT & E INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Minghao Zhang, Zengqiang Cao, Guo Zheng, Duquan Zuo, Chengxiang Guo, Yuehaoxuan Wang
Summary: This paper reports an experimental study on the forming mechanism and mechanical properties of single-lap electromagnetic riveted joints with varying rivet-hole clearances. The results demonstrate that the rivet-hole clearance has a significant impact on the initial damage and mechanical properties of riveted joints.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Mostafa Kaboodkhani, Hamid Bayesteh, Mohammadjavad Hamidia
Summary: This study proposes a method for quantitative post-earthquake failure safety assessment of RC framed buildings with non-ductile joints using crack image analysis. The complexity and irregularity of crack images are quantified through generalized fractal dimensions, while energy-based damage indices are used to quantify seismic damage. Predictive equations are also presented to estimate the extent of the damage.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Materials Science, Characterization & Testing
Xintao Xu, Zhixuan Chang, Eryong Wu, Shiwei Wu, Jian Chen, Keji Yang, Haoran Jin
Summary: This paper proposes a novel nozzle-side inspection method based on the data fusion of multi-view plane wave imaging (PWI) for ultrasonic non-destructive testing of nozzle-to-pipe welds. Experiments demonstrate the capability of sensitivity mappings to optimize the inspection configuration and serve as filters to fuse multi-view images. The proposed method enables accurate defect characterization and detection of slag, cracks, and lack of penetration in nozzle specimens.
NDT & E INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Bahadir Furkan Kinaci, Huseyin Botsali, Cevat Ozarpa, Ismail Esen, Hayrettin Ahlatci
Summary: This study investigated the fatigue occurring in the draw hook body and its influencing factors experimentally and numerically. The material's microstructure characterization and mechanical properties were examined. The fatigue behavior and endurance limit were obtained through testing and computer analysis.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Materials Science, Multidisciplinary
Shuai Zhang, Shuye Zhang, Hongzhi Zhou, Kyung-Wook Paik, Tianran Ding, Weimin Long, Sujuan Zhong, Peng He
Summary: Microwave Hybrid Heating (MHH) is a promising method for material joining, allowing for selective and uniform heating. This experimental study focused on investigating the characteristics and reliability of joints made using nano-Sn-3.0Ag-0.5Cu soldering paste and MHH technique. The research findings showed that the shear strength of the joints reached its peak value under specific microwave power and exposure time, but decreased after thermal shock tests.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Peibin Ma, Mingyang Wang, Aiying Chen, Lijian Gu, Zhiyi Ding, Xiaogui Wang, Bin Gan
Summary: Nano-twinned boundaries in high-temperature alloys play a crucial role in regulating the distribution of nano-precipitates and enhancing mechanical properties.
MATERIALS CHARACTERIZATION
(2024)
Article
Engineering, Mechanical
Yanchun Yin, Biao Chen, Yubao Zhang, Shudong He, Chuanru Yao, Chuancheng Liu
Summary: Borehole pressure relief technology is an important method for stress control in preventing coal burst. The effect of pressure relief on energy storage and dissipation was evaluated through uniaxial compressing tests of coal specimens with different boreholes. The results showed that the diameter and number of boreholes have a negative exponential correlation with the energy characteristics of the coal specimens. Energy prerelease index, energy dissipation-increasing index, and bursting liability weakening index are proposed to better evaluate the effect of borehole pressure relief.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Materials Science, Characterization & Testing
Shijie Jin, Chengjun Di, Jiakai Su, Siqi Shi, Zhongbing Luo
Summary: This paper proposes a mirrored composite-mode total focusing method (CTFM) for the quantitative detection and profile characterization of priori unknown irregular planar defects. Multiple views and normalization are used to achieve accurate imaging results.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Zhenpeng Yu, Qi Yang, Rui Tang, Furong Li
Summary: This study investigates the mechanical behaviors of hydraulic asphalt concrete (HAC) under combined compressive-shear stress at different temperatures and normal compressive stresses. The results show that the combination of normal compressive stress and temperature affects the peak shear stress and correlated shear strain. An increase in normal compressive stress leads to the emergence of horizontal cracks and an amplification of deformation at elevated temperatures. The peak shear stress progressively increases with an increase in normal compressive stress, but decreases with an increase in temperature. The study also establishes three modified compressive-shear failure criteria for HAC at different temperatures.
JOURNAL OF TESTING AND EVALUATION
(2024)
Article
Materials Science, Characterization & Testing
Yinshan Yu, Ding Ping, Jinsong Wei, Hui Zhang, Dongyang Zhang, Yudong Yang
Summary: This study investigates the quantitative analysis of mancozeb concentration in water quality detection using spectrophotometry. It is found that mancozeb concentration has a good linear correlation with total nitrogen and turbidity. Prediction models are established to detect the concentration of mancozeb using various parameters. The experimental results confirm the accuracy and effectiveness of the measurement method by comparing the analyzed mancozeb concentration with the actual value.
JOURNAL OF TESTING AND EVALUATION
(2024)
Article
Materials Science, Characterization & Testing
Zhihua Xue, Lan Wang, Chao Li, Le Zhang
Summary: This research focuses on styrene-butadiene-styrene-modified asphalt, and explores the significance of improving softening point test-related indicators through the improvement of testing methods and the combination with other tests, providing new ideas for asphalt performance evaluation.
JOURNAL OF TESTING AND EVALUATION
(2024)
