Article
Nanoscience & Nanotechnology
Minhan Fang, Fuguo Hu, Yuanfei Han, Jianwen Le, Jiangjing Xi, Jingwen Song, Linda Ke, Meili Xiao, Weijie Lu
Summary: This study investigated the weakened anisotropy of tensile properties of selective laser melted Ti6Al4V through heat treatment, revealing that both tensile strength and ductility anisotropy decreased after heat treatment. An algorithm based on EBSD data was utilized to determine the active slip system of each grain and evaluate the Schmid factors, providing a quantitative explanation for the anisotropy of strength and the weakening mechanism. The dependence of Schmid factors on primary beta grains, the number of primary beta grains, and the presence of equiaxed grain boundary alpha explained the variation of ductility with different theta angles.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Review
Chemistry, Physical
Yun Zhou, Kai Zhang, Yaru Liang, Jun Cheng, Yilong Dai
Summary: Magnesium and its alloys, known for their low density, high specific strength, and good biocompatibility, hold great potential in biomedicine, transportation, and aerospace. Laser selective melting technology offers advantages such as the ability to manufacture complex parts with high precision. However, the application of magnesium alloys in laser selective melting is less developed due to some of their disadvantages.
Article
Materials Science, Multidisciplinary
Xu-Han Gu, Tao Lu, Tao Zhang, Wei Guo, Ye Pan, Ting Dai
Summary: The anisotropy of microstructures and mechanical properties of FeCoNiCr0.5 high-entropy alloys prepared by selective laser melting was investigated. It was found that the alloy exhibited different microstructures and mechanical properties in different directions, leading to anisotropic behavior.
Article
Materials Science, Multidisciplinary
Yabo Hu, Chaofang Dong, Decheng Kong, Jungang Ding, Xing He, Xiaoqing Ni, Liang Zhang, Xiaogang Li
Summary: Through heat treatment, the performance of the CoCrMoW alloy fabricated by selective laser melting can be improved, but different treatment conditions lead to different changes in the alloy properties. The changes in the microstructure of the alloy have a significant impact on its mechanical properties and corrosion resistance.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Hao Xu, Ping Lv, Meng Xie, Mulin Hu, Zhongjie Li, Anping Dong, Peng Huang, Haiping Liu
Summary: The dependence of corrosion resistance in artificial saliva of the Ti15Mo alloy on different orientations was investigated. The as-built alloy showed excellent corrosion resistance regardless of orientation. However, anisotropy in corrosion resistance was observed, with the highest resistance in the 90-degree orientation. Grain orientation was found to be the major factor affecting the anisotropic corrosion resistance.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Optics
Shengzhao Yang, Quanquan Han, Yingyue Yin, Jian Gao, Zhenhua Zhang, Yuchen Gu, Kenny W. Q. Low
Summary: This study successfully mitigated microcracking in HX alloy by adding 2wt% microscale TiB2 particles, which increased grain boundaries and improved mechanical performance and electrochemical corrosion resistance.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Siyu Zhou, Baoxing Wang, Dongjiang Wu, Guangyi Ma, Guang Yang, Wenyi Wei
Summary: The increase of pulse energy affects the morphology, element distribution, microstructure, and corrosion resistance of the weld joint. Increasing pulse energy can enhance the penetration depth and bead width of the weld metal, but decrease the dilution level of 304 base metal and the grain size in the weld metal.
OPTICS AND LASER TECHNOLOGY
(2021)
Review
Materials Science, Multidisciplinary
Maohang Zhang, Baicheng Zhang, Yaojie Wen, Xuanhui Qu
Summary: This paper introduces the application studies of selective laser melting in the field of nickel-based superalloys, including the strengthening mechanism and phase change evolution, the influence of laser parameters and heat treatment process on mechanical properties, as well as the industrial applications and future prospects.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Haiou Yang, Bing Liu, Pengda Niu, Zhiqi Fan, Tiechui Yuan, Yin Wang, Yang Liu, Ruidi Li
Summary: This study prepared 316L stainless steel components using selective laser melting (SLM) techniques under different laser scanning angles and investigated the impact of microstructural heterogeneity on the mechanical properties. The results showed that the highest elongation was achieved when the laser scanning angle was parallel with the tensile loading direction, and the maximum yield strength was obtained when the laser scanning angle was 30-45 degrees.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Min Xie, Fei Li, Shengfeng Zhou, Liangliang Lu, Fan Peng, Longjiang Zhang, Yaozhong Zhang, Yang Lu
Summary: By incorporating phosphorus (P) as a third component, a magnetic phase with a nanotwin structure was formed in situ. Selective laser melting (SLM) was utilized to synthesize a Cu-Fe-P immiscible alloy with an integrated structure and function. The microstructure consisted of a magnetic heterogeneous Fe-P-rich phase distributed within an ε-Cu Cu-rich matrix, with the fibrous Fe2P phase exhibiting precipitation of α-Fe and the Fe-P-rich phase experiencing the precipitation of high-density nanotwinned Cu (nt-Cu) particles.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Optics
Shuai Huang, Bingbing Sun, Shaoqing Guo
Summary: Selective laser melting was used to fabricate TA15 titanium alloy, and its microstructure and properties were analyzed after heat treatment. The acicular martensite transformed into alpha phases after heat treatment, leading to an increase in elongation. Though the tensile and yield strength decreased, the toughness of the alloy improved as indicated by increased dimple size and depth in the fracture morphology.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Shaoli Zhang, Youmin Shi, Yaping Zhang, Pengfei Guo, Xiangyang Li, Kai Luo
Summary: The microstructure and electrochemical behavior of Hastelloy X fabricated by selective laser melting were studied. The microstructure of selective laser melted Hastelloy X consists of columnar crystals grown along the deposition direction, composed of fine columnar dendrites. The electrochemical tests show that the passive film formed on the vertical section (VS) has better stability and protectiveness than that on the horizontal section (HS). The dissolution rate of the interdendritic region is faster than that of the dendritic trunk, resulting in a faster dissolution rate for the center of the molten pool than that of the edge, and the dissolution rate of the HS is faster than that of the VS.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Characterization & Testing
Zong Xuewen, Zhang Jian, Fu Hanguang
Summary: Selective laser melting was used to prepare Hastelloy X alloy specimens at various laser inclination angles. The temperature field analysis showed a dynamic process with high cooling rates, affecting the tensile strength and yield strength of the alloy. At an inclination angle of 30 degrees, the mechanical properties of the alloy met the requirements of the aviation industry with reduced voids and crack defects.
Review
Automation & Control Systems
Haolin Jia, Hua Sun, Hongze Wang, Yi Wu, Haowei Wang
Summary: This paper reviews the impact of scanning strategies on the performance of 3D printed parts in additive manufacturing. It mainly focuses on the scanning strategies in the selective laser melting process and summarizes the effects of various scanning strategies. Suggestions for optimizing scanning strategies for better performance are provided based on the analysis.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Qingxia Zhang, Lingtao Meng, Xiaotian Yin, Shenghai Wang, Yong Liu, Li Wang
Summary: The study reveals that heat treatment can enhance the mechanical properties of Hastelloy X fabricated by SLM, particularly at high temperatures, but it reduces corrosion resistance and hardness due to chromium precipitation.
Article
Construction & Building Technology
Qi Jiang, Wei Liu, Shaopeng Wu, Xuanwen Gou
Summary: This study analyzes the erosion mechanisms of NaCl solution on asphalt concrete and finds that NaCl solution softens asphalt and promotes the intrusion of crystalline salt into it. Salt crystallization alters the surface roughness of aggregates, resulting in a decrease in skid resistance but an improvement in compressive strength. Additionally, the concentration of NaCl solution initially has no significant impact on the mechanical performance of asphalt concrete, but its domination gradually increases with the intensification of cyclic effects.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Lili Kan, Lan-qing Dai, Ning Kong, Bin Peng, Fei Wang
Summary: This paper investigates the effect of freezing and thawing cycles on the tensile behavior of cracked ultra-high performance concrete (UHPC). The results show that long-term freezing and thawing action deteriorates the cracking strength, tensile strength, tensile strain, and strain energy of cracked UHPC. On the other hand, the action of water generally favors the development of tensile properties of UHPC. The crack distribution tends to be unsaturated under freezing and thawing environment, and the re-hydration reaction is hindered. The pore structure near the crack varies under different environments.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Xin Xiao, Jingwei Li, Qingke Meng, Xiangshan Hou, Yanhui Liu, Xujiang Wang, Wenlong Wang, Shengtao Lu, Yuzhong Li, Yanpeng Mao, Tong Li
Summary: Preparing gypsum-based self-leveling mortar (GSLM) using beta-hemihydrate gypsum and solid wastes-derived sulfoaluminate cement (WSAC) can improve the mechanical performance of the mortar, but phosphorus impurities can weaken the hydration speed and degree.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Sihang Bao, Junzhen Di, Yanrong Dong, Ziqing Gao, Qing Gu, Yuanfang Zhao, Hongyu Zhai
Summary: Tailings dam break and leakage accidents pose a threat to the safety of people in mining areas and cause severe environmental pollution. This study focuses on solidifying tailing sand using microbial induced calcite precipitation (MICP) to improve strength and fix heavy metals. The curing time of MICP bio-cemented tailings is found to significantly impact the strength of tailings, while its effect on heavy metal fixation is minimal. The optimized MICP curing time is 10 days, resulting in improved strength and cementation of tailings particles.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Ferhat Benmahiddine, Fares Bennai, Achraf Charaka, Ameur El Amine Hamami, Abdelkader Tahakourt, Rafik Belarbi
Summary: This paper studied the effects of hysteresis on the hygrothermal behavior at the building scale. Through laboratory validation and numerical simulations, it was found that hysteresis has a significant impact on the relative humidity and total heat fluxes in buildings, while it does not have a noticeable effect on temperature variations.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
You Gao, Wei He, Xiayang Zhang, De'an Sun, Pei Li
Summary: This study determined the boundary line between the swelling and compression deformation zone in lateritic clay through wetting tests, and proposed a simple bimodal SWRC model. It also found that the existing strength model underestimated the tested values in the medium to high suction range, therefore a segmented strength equation was introduced for enhanced predictions of the strength properties of lateritic clay.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Prabhath Ranjan Kumar Soda, Asheer Mogal, Kalyan Chakravarthy, Nikhil Thota, Nimish Bandaru, Sanjay Kumar Shukla, K. M. Mini
Summary: This study investigates the use of encapsulated bacteria to improve the self-healing ability of concrete. Through various tests, it is found that using 20% cement-coated alginate beads (CCAB) and 5% nanosilica (NS) can achieve optimal strength and healing. This research is significant for enhancing the durability of concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Shizhe Wang, Haiping Wu, Wen Yang, Wei Wang, Zhibo Zhu, Kun Nie, Luoxin Wang, Hua Wang, Jing Wu
Summary: In this study, photothermal-heat storage concrete (PHSC) was developed with excellent photothermal conversion performance and heat storage capacity. By absorbing and storing solar energy during the day and releasing it at night, PHSC can effectively reduce energy consumption in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Robin Deb, Jialuo He, Geetika Mishra, Yaghoob (Amir) Farnam
Summary: Incorporation techniques of phase change materials in cementitious composites have a significant influence on thermal properties. This study investigated the thermal behavior of low-temperature PCM when subjected to varying temperature change rates and pore confinement inside the porous network of lightweight aggregates. The results showed that ramp rates affect the nucleation and crystallization growth process during the phase transition, and the pore structure of the aggregates affects the supercooling phenomenon and confinement pressure of the PCM.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Eduardo Ferreira, Payam Sotoudeh, Dagmar Svecova
Summary: This study investigates the fatigue behavior of concrete under different stress reversal conditions. The results indicate that stress reversal generally causes more severe damage and reduces the cycles to failure compared to tensile fatigue. Additionally, adding some level of compression contributes to the energy required for failure under stress reversal fatigue. Specimens with higher concentration of fractured aggregates achieve longer fatigue lives.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Mag Raj Gehlot, Sandeep Shrivastava
Summary: This study evaluates the compatibility relationship between plaster bonds and the substrate under an accelerated aging environment, and finds that incorporating an appropriate amount of granite cutting waste can improve the strength parameters and adhesion of the cement mortar.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Min Zhang, Qirui Luo, Mingke Deng, Shixing Zhao
Summary: This study investigated the bond behavior between carbon FRCM composites with added short fibers and concrete substrates. The effects of different factors were considered and 36 specimens were tested and discussed. The experimental results were analyzed in terms of failure mode, load-slip curve, and characteristic parameters, and the contribution of weft yarns was taken into account in the developed bondslip model.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Dengkai Liu, Hongniao Chen, Ray Kai Leung Su
Summary: The susceptibility of building stones to fire and high temperature was investigated in this study by examining their physical and mechanical properties. The results show that both compressive and tensile properties of stones are affected by temperature changes. The tensile strength is particularly sensitive to temperature changes, requiring special attention to the components subjected to tensile stress in stone buildings. Principal component analysis was used to predict the mechanical properties of stones, providing a new method for calculating the residual mechanical properties after high temperature or fire.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Joso Maria Raposo, Eduardo Cavaco, Luis Costa Neves, Eduardo Julio
Summary: This paper investigates the correlation between the friction coefficient and the surface roughness of concrete-to-concrete interfaces. Experimental tests were performed on specimens with different surface treatments, and the surface roughness parameters were analyzed and correlated with the shear strength and friction coefficient. The results showed that certain roughness parameters had a strong positive correlation with the friction coefficient, while others had little or no correlation. A novel combined roughness parameter with optimized correlation was proposed.
CONSTRUCTION AND BUILDING MATERIALS
(2024)
Article
Construction & Building Technology
Chiara Riccardi, Massimo Losa
Summary: The interest in using bio materials in asphalt pavements is growing due to economic reasons and environmental benefits. This study aimed to review the use of bio extenders as additives in binders, with a focus on replacements greater than 20% of fossil binder. The properties of bio-extended binders were found to vary substantially depending on the biomass source and production process.
CONSTRUCTION AND BUILDING MATERIALS
(2024)