Article
Materials Science, Multidisciplinary
Wei Sun, Ning Cui, Shuling Zhang, Tiewei Xu, Xiaopeng Wang, Fantao Kong
Summary: A laminated composite was successfully fabricated and its microstructure and mechanical properties were investigated. The composite exhibited high bonding strength, improved flexural strength and fracture toughness, and superior tensile properties compared to the monolithic alloy.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Characterization & Testing
Guillermo Cosarinsky, Jorge F. Cruza, Mario Munoz, Jorge Camacho
Summary: This study develops an ultrasound imaging method for industrial and structural components, which can automatically detect the surface and estimate the probe position and orientation. By fitting the parametric models based on measured surface echoes, the method achieves the measurement of surface echoes and estimation of probe position and orientation. Validation experiments show that this method can accurately detect defects in the component under different probe positions and orientations.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Multidisciplinary
Shuai Chen, Ruyu Tian, Jiayue Wen, Yanhong Tian
Summary: In this study, the interfacial microstructure evolution and reliability of Cu/Sn-3.0Ag-0.5Cu (SAC305)/Ni and Cu/Sn-3.0Ag-0.5Cu-0.05TiO2 (SAC305-0.05TiO2)/Ni interconnections under thermal shock were investigated. The results showed that the addition of TiO2 nanoparticles can suppress the growth of interfacial IMCs and improve the reliability of the connections.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Characterization & Testing
Lu-Nan Dai, Chen-Yin Ni, Kai-Ning Ying, Ling Yuan, Zhi Yang, Wei-Wei Kan, Zhong-Hua Shen
Summary: A laser ultrasonics based frequency domain synthetic aperture focusing technology has been developed for imaging internal horizontal hole defects in bimetallic composites with a diameter of approximately 1.0 mm. The results show that this technology can improve imaging quality and locating capability, with a low testing error.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Bin Ma, Qingzhao Kong, Yewei Ding, Lin Chen, Weihang Gao
Summary: This study proposes an end-to-end damage detection framework that integrates emphasized channel attention, propagation, and aggregation-time-delay neural network (ECAPA-TDNN) with percussion techniques. The framework effectively detects internal damage within timber structures and distinguishes between different sizes of damage.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Zhiyuan Zhao, Lishuai Liu, Wen Liu, Da Teng, Yanxun Xiang, Fu-Zhen Xuan
Summary: The total focusing method (TFM) is a standard technique in ultrasonic phased array imaging and plays a crucial role in industrial non-destructive testing (NDT). This paper presents an improved TFM approach by formulating its imaging principle as a Boolean matrix and establishing a discretized tensor-based model. By employing sparse regularization strategy and a non-negative constraint solution algorithm, the proposed approach demonstrates superior capabilities in defect characterization and noise suppression compared to the traditional TFM.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Yong-Ho Kim, Jung-Ryul Lee
Summary: An artificial intelligence system for phased-array ultrasonic testing (PAUT) was developed in this study using a newly configured training dataset and neural network. Three experiments were conducted to verify its performance, showing improved classification accuracy of signals and successful data evaluation, benefiting the PAUT experts.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Kai Wang, Zechen Luo, Shuang Xu, Wenxin Lai, Ruiqi Guan, Qijian Liu, Menglong Liu, Jing Rao, Xinlin Qing
Summary: In this study, an analytical framework is proposed to interpret the formation of defect-induced LDR in multilayered structures. By analyzing the reflections of Lamb waves at defect boundaries and obtaining the phase shift of reflected waves, the relationship between LDR frequency components and defect size is determined. Experimental validations are performed to improve the precision of defect characterization using LDR.
NDT & E INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Longyun Zhou, Xiaojun Li, Qiushi Yan
Summary: This paper studies the dynamic response and damage mechanism of piers of sea-crossing bridges under underwater explosion loads using the arbitrary Lagrangian-Eulerian (ALE) method. The correctness of the explosive load and reinforced concrete material models is verified, and a finite element (FE) model of a pier under an underwater explosion load is established. The study shows that the detonation point location and explosive weight have significant effects on the damage to the pier.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Zhan-Feng Chen, Wei-Peng Chu, Lei Shi, Yan Li, Wen Wang, Yu-Xing Li
Summary: This paper studies the burst pressure and analysis methods of subsea pipelines with asymmetrical corrosion defects. By establishing a pipeline model, conducting finite element analysis, proposing a new method for simplifying defects, and presenting a modified prediction equation, this study provides a novel approach to obtain the burst pressure of subsea pipelines with complex defects.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Engineering, Mechanical
Yu-hui Zheng, Wei-hui Zhong, Yue Zhang, Zheng Tan, Shi-Chao Duan, Bao Meng, Yao Gao, Hong-chen Wang
Summary: Partially restrained connections in steel frames can undergo damage pattern reconfiguration under fire conditions. The insulating effect of floor slabs affects the thermal and mechanical states of remaining structures, influencing the potential damage modes and collapse-resistant mechanisms. A comprehensive analysis of influence parameters was conducted to understand the failure mechanism and collapse resistant action of a typical partially restrained connection.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Materials Science, Multidisciplinary
Zih-You Wu, Yin-Ku Lee, Su-Yueh Tsai, Po-Yu Chen, Jenq-Gong Duh
Summary: With the development of the artificial intelligence (AI) industries, electronic packaging is advancing towards high density, high efficiency, and multi-functionality. The application of microbumps is necessary to achieve high density and small-scale interconnection. In this study, three types of full intermetallic compounds (IMCs) bumps were fabricated, and the mechanical and thermal properties of IMCs were analyzed. The results showed that the full IMCs bumps with added Ni and Zn exhibited consistent structure and excellent thermal stability, providing a reliable microstructure for application.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Geng Liu, Linran Yu, Jie Su, Ran Ding, Min Xiong, Qi Gao
Summary: In this study, a flash austenitization heat treatment approach was used to achieve a dual-phase microstructure consisting of retained austenite and fine-grained ferrite in low-carbon TRIP steel. Phase-field simulations revealed the acceleration of ferrite transition kinetics in the Mn-depleted region and the influence of chemical heterogeneity of C and Mn on the stabilization of austenite.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Yunbin Lu, Yangju Feng, Wei Wang, Wenke Wang, Jianlei Yang, Wenzhen Chen, Guorong Cui, Dongdong Zhuang, Hongyang Cao
Summary: In order to improve the wear resistance of titanium alloy, titanium matrix composites with network distributed TiBw were fabricated. The results showed that the wear rate of the composites decreased by 17.2% at room temperature and 38.4% at high temperature compared to the TA15 alloy. The TiBw in the composites enhanced work hardening, improved thermal conductivity, and effectively hindered dislocation movement and promoted dynamic recrystallization during high-temperature wear.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Multidisciplinary
Jiachen Zhang, Fan Lu, Xinxin Liu, Taiwen Huang, Rui Li, Changsheng Tan, Guojun Zhang, Lin Liu
Summary: This study investigates the effects of Re and Ta interactions on the precipitation of the TCP phase in experimental alloys under long-term thermal exposure. The study finds that microstructure segregation is not fully eliminated even with standard heat treatment, and the interaction between Re and Ta enhances the formation of the TCP phase. Thermodynamic calculations and first-principles analysis reveal that Re significantly improves the driving force of TCP phase precipitation. The study also observes a phase transition from the sigma-phase to the P-phase, with Ni playing a crucial role in the diffusion process.
MATERIALS CHARACTERIZATION
(2024)
Article
Materials Science, Characterization & Testing
Ayodya Udara Veediya Bandara Bulathsinhala, Udeni Gnanapriya Anuruddha Puswewala
Summary: Bentonite is commonly used as the drilling fluid for cast-in-situ bored pile constructions. It has been observed that the formation of bentonite filter cake significantly reduces the shaft resistance capacity of piles in sedimentary bed rocks. However, its impact on crystalline metamorphic rocks is relatively insignificant. The lack of reliable experimental data has resulted in conservative pile designs being used, but recent studies conducted in Sri Lanka suggest that unnecessary conservatism can be avoided.
JOURNAL OF TESTING AND EVALUATION
(2024)
Article
Materials Science, Characterization & Testing
Yan Luo, Kuibo Wang, Xiaobin Wu
Summary: This study systematically assesses the influence of internal structure on the outgassing property of alumina ceramics. The results show that denser alumina structure leads to lower outgassing rate, and the internal structure also has some influence on the outgassing characteristics of the material.
JOURNAL OF TESTING AND EVALUATION
(2024)
Article
Materials Science, Characterization & Testing
Ming-Hsiang Shih, Shih-Heng Tung, Wen-Pei Sung
Summary: This study proposes a new drilling method for stress measurement that incorporates rigid body displacement parameters to improve accuracy. Experimental results show a high degree of agreement in the identified images, indicating the reliability and accuracy of the stress measurement method.
JOURNAL OF TESTING AND EVALUATION
(2024)
Article
Engineering, Mechanical
R. Ranjeeth, D. Aditya, Anil Gautam, S. P. Singh, S. Bhattacharya
Summary: This study investigated the failure of a water-wall tube in a boiler, identifying the root cause as localized short-term overheating due to flame impingement. The failure exhibited characteristics of short-term overheating, including fish mouth-type rupture opening, excessive wall thinning, compliance with standards, and structural changes. Analyzing the failure mechanism can improve the performance, safety, and reliability of high-temperature equipment.
ENGINEERING FAILURE ANALYSIS
(2024)
Article
Materials Science, Characterization & Testing
Dongsoo Lee, Jung-Doung Yu, Seokgyu Jeong, Geunwoo Park, Jong-Sub Lee
Summary: This study suggests a more accurate method for evaluating the integrity of drilled shafts using electromagnetic waves propagating through transmission lines. The experimental results show that the location and size of sound and defect segments can be more clearly identified with the use of connectors on the transmission line.
NDT & E INTERNATIONAL
(2024)
