Article
Engineering, Manufacturing
Qimin Shi, Gaoyan Zhong, Yi Sun, Constantinus Politis, Shoufeng Yang
Summary: This study vertically prepared Multi-Material parts of H13 tool steel and IN625 superalloy by SLM, revealing the interfacial macrosegregation mechanism. The laser melting+remelting strategy developed can mitigate interfacial macrosegregation and efficiently migrate H13 into IN625 molten pools.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Chemistry, Physical
Jian Zhang, Manjiang Yu, Zhuoyuan Li, Yang Liu, Qingmao Zhang, Rui Jiang, Shufeng Sun
Summary: The study investigates the effect of laser energy density on the microstructure, residual stress, and phase composition of H13 steel treated by laser surface melting. It is found that increasing energy density leads to changes in microstructure and residual stress of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Jiandong Wang, Yuzhou Zeng, Xiaopeng Qi, Yu Xue, De Xu, Liqun Li, Yunxiang Tong, Fengchun Jiang
Summary: In this paper, TiCp/Ti6Al4V composites were fabricated using laser melting deposition (LMD) technology and the microstructure and microhardness of different deposited layers were analyzed. The results show that the composites have a graded microstructure and microhardness distribution. The microhardness increases gradually from the bottom layer to the top layer in the low power composite, while the high power composite shows a more significant increase in microhardness.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Coatings & Films
Wenchao Xi, Boxue Song, Zixuan Wang, Tianbiao Yu, Jun Wang, Yuanxing Dai
Summary: This study investigated the effect of laser re-melting on the morphology and mechanical properties of cladding layer, showing that appropriate laser power can improve the morphology and enhance microhardness and wear resistance. Excessive re-melting laser power can lead to defects and deterioration of mechanical properties in the cladding layer.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
G. V. Krishna Pradeep, Muthukannan Duraiselvam, K. Sivaprasad
Summary: This study investigates the tribological behavior of gamma titanium aluminide alloy treated with laser surface melting, showing that the alloy treated with LSM exhibits higher microhardness, lower wear rate, and better surface roughness compared to the untreated substrate.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Chemistry, Physical
Fei Lei, Tao Wen, Feipeng Yang, Jianying Wang, Junwei Fu, Hailin Yang, Jiong Wang, Jianming Ruan, Shouxun Ji
Summary: Selective laser melting (SLM) can improve the mechanical properties of H13 steel by optimizing the process parameters and establishing the correlation between microstructure and mechanical properties. Through examination of microstructures, it was found that the SLMed H13 exhibited cellular structures and columnar grains, with lath martensite and retained austenite containing nanoscale carbides. The as-SLMed H13 showed excellent strength-ductility synergy due to the fine grains, unique cellular structures, and presence of dislocations.
Article
Materials Science, Multidisciplinary
Min Zheng, Lei Wei, Jing Chen, Qiang Zhang, Guohao Zhang, Xin Lin, Weidong Huang
Summary: This study investigated the development of surface features of Inconel 718 samples fabricated by selective laser melting under different laser powers and scanning speeds. The surface tension was identified as a key factor in the SLM process, pulling melted powder into the molten pool and affecting surface morphology.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Yiwei Sun, Jialong Wang, Menglin Li, Yuxuan Wang, Changhao Li, Ting Dai, Menglong Hao, Hui Ding
Summary: Fabricating molds and dies using additive manufacturing (AM) technology is attractive for higher cooling efficiency. This study investigated the thermal and mechanical properties of an H13 tool steel processed by selective laser melting (SLM) and identified the factors affecting its thermal conductivity.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Xuebin Chen, Lei Zhao, Dongling Li, Liwu Jiang, Haizhou Wang
Summary: After adding different mass percentages of tungsten powder to H13 mold steel and microwave sintering, the Vickers hardness values of the samples were found to be positively correlated with tungsten content, and the grain size decreased with increasing tungsten content.
Article
Materials Science, Multidisciplinary
Jian Chen, Men Fan, Libo Zhou, Wei Chen, Yanjie Ren, Wei Li, Weiying Huang, Yan Niu, Zhou Li, Cong Li
Summary: In this study, bionic-inspired Ti-15Mo gradient porous structures were successfully fabricated using selective laser melting. The fatigue performance of these structures was investigated, and the results showed that the gradient density distribution had a significant influence on fatigue performance, with the lateral gradient structure exhibiting the best performance and the vertical gradient structure exhibiting the poorest performance.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Lichun Zheng, Bo Peng, Yan Li, Kai Chen, Zebin Ren, Zhouhua Jiang
Summary: Ce and Mg elements are susceptible to burn off during the ESR process. This study designed and evaluated CaF2-based ESR slags with different compositions to retain Ce and Mg in contact with H13 steel. The results showed that the Ce2O3, Al2O3, and CaO contents in the slag had a significant impact on the final Ce content, while the MgO and Al2O3 contents affected the final Mg content. The recommended slag composition for producing H13 steel with Ce and Mg was CaF2-10 to 30 wt pct Ce2O3-10 wt pct MgO-20 wt pct CaO.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Chemistry, Physical
Debajyoti Bhaduri, Tina Ghara, Pavel Penchev, Soumitra Paul, Catalin Pruncu, Stefan Dimov, David Morgan
Summary: A novel LP strategy was proposed to improve the re-melting of aluminium alloys by introducing a thermally insulating ceramic baseplate, resulting in significant reductions in surface roughness and residual stresses. The study highlights the importance of controlling heat dissipation in laser polishing of thermally conductive materials to achieve desired surface integrity properties.
APPLIED SURFACE SCIENCE
(2021)
Article
Optics
R. A. Savrai, D. Toporova, T. M. Bykova
Summary: The study aims to improve the quality of AISI H13 tool steel by varying laser power and scanning speed during SLM. It was found that surface roughness and porosity can be effectively influenced by controlling laser power and scanning speed, but preventing cracking requires alternative technological solutions.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Engineering, Mechanical
S. Martin Vinoth, P. Dinesh Babu
Summary: Cladding-based repair using CrNiW and CrNiFeAlZr alloys was found to have better performance in extending die life compared to welding or flame spraying repair approaches. The CrNiW cladding had higher microhardness than the CrNiFeAlZr cladding and substrate, indicating its significant impact on microhardness. The optimization process was conducted using a response surface methodology with a Box-Behnken design.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Stepan Kolomy, Josef Sedlak, Jan Zouhar, Martin Slany, Marek Benc, David Dobrocky, Igor Barenyi, Jozef Majerik
Summary: This paper investigates high-strength M300 maraging steel produced using the selective laser melting method. The effects of aging temperatures on mechanical properties and microstructure are analyzed. The compressive yield strength increases after heat treatment at 480 degrees C and then gradually decreases, while the microhardness reaches its highest value at 480 degrees C. The structure of the steel changes from melt pools to a fine-grained structure with a high proportion of high-angle grain boundaries (72%).
Article
Engineering, Mechanical
Miloslav Kepka, Miloslav Kepka Jr, Radovan Minich
Summary: This paper focuses on the fatigue life evaluation of the bodywork of a new articulated electric (battery) bus. The findings resulted in recommendations to improve the operational reliability of a particular vehicle and provided challenges for future research.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
T. Dusautoir, B. Berthel, S. Fouvry, P. Matzen, K-D. Meck
Summary: This study investigates the impact of post-processing treatments on the fatigue limit of additive manufactured Ti-6Al-4V under stress gradients, with a focus on surface integrity.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Zhuofan Xia, Di Wu, Xiaochen Zhang, Jianqiu Wang, En -Hou Han
Summary: The study reveals the surface-initiated rolling contact fatigue (RCF) failure mechanism under heavy load and initial high roughness surface. The results indicate that precursor of collapsed morphology and nanocrystalline layer are the main factors causing lower RCF life with high roughness compared to low roughness surfaces. The spalling failure initiating from low roughness surface under heavy load is strongly dependent on surface plastic deformation.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Daniel Gren, Knut Andreas Meyer
Summary: Rolling contact loading can cause plastic deformation and fatigue cracks. Current rail standards do not consider the effect of plasticity on mechanical behavior. This study proposes a new method for evaluating the fatigue life of deformed material and finds that superimposed compressive axial loads can increase fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
R. Kumar, S. Sanyal, J. Bhagyaraj, E. Hari Krishna, S. Mukherjee, K. Prasad, S. Mandal
Summary: This study investigates the thermomechanical fatigue (TMF) behavior of Timetal 834 alloy under different loading conditions. The results show that the alloy exhibits different cyclic hardening and softening responses at different strain amplitudes. The strain amplitude and phase angle have significant effects on the TMF life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Kai Donnerbauer, Tobias Bill, Peter Starke, Ruth Acosta, Bharath Yerrapa, Christian Boller, Klaus Heckmann, Frank Walther
Summary: Given the aging of nuclear power plants, it is important to develop methods for evaluating the integrity of components and structures in nuclear engineering. Suitable nondestructive testing methods can detect material degradation and determine its fatigue life. This study utilized various NDT parameters and scanning electron microscopic methods to explore the relationship between microstructure evolution and NDT data.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Liuyong He, Jiang Zheng, Tianjiao Li, Houkun Zhou, Lihong Xia, Bin Jiang
Summary: This study quantitatively analyzed the effects of precipitates on the deformation mode, cracking mode, and mechanical behavior of WE54 magnesium alloy during low-cycle fatigue. It was found that precipitates promoted the activation of dislocation slip and suppressed the activation of twinning, affecting the cracking mode and mechanical behavior.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Xiangkang Zeng, Conghui Zhang, Wenguang Zhu, Mingliang Zhu, Tongguang Zhai, Xiaomei He, Kangkai Song, Zhuohang Xie
Summary: The cyclic deformation behaviors and damage mechanisms of pure Zr were investigated. The cyclic stress response was mainly influenced by substructure evolutions. Prismatic < a > dislocation slip was identified as the dominant deformation mechanism. Fatigue damage was not only influenced by the initial texture, but also other factors.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Jingyu Yang, Bingbing Li, Yiming Zheng, Gang Chen, Xu Chen
Summary: Heat treatment is used to improve the low-cycle fatigue performance of additive manufactured 316LN stainless steel. The heat-treated material demonstrates initially cyclic hardening followed by softening behavior, and shows a stronger resistance to crack propagation compared to the as-built material, resulting in a longer fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Lang Zou, Dongfang Zeng, Xiong Chen, Jun Li, Hai Zhao, Liantao Lu
Summary: This study investigates the competitive relationship between fretting fatigue and plain fatigue in press-fitted railway axles. By changing the depth of the stress relief groove, the plain fatigue limit and fretting fatigue strength were tested. Detailed information was gathered, and an evaluation methodology integrating finite element simulation and the Modified Wohler Curve Method was established. The study concludes that the optimal groove depth, which balances the anti-fatigue capabilities, depends on the number of test cycles.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Davide Leonetti, Koji Kinoshita, Yukina Takai, Alain Nussbaumer
Summary: This paper investigates the fatigue behavior of non-load-carrying transverse welded steel attachments, including fatigue crack monitoring and fracture surface analysis under constant and variable amplitude loading. A procedure is proposed to obtain a Markov transition matrix based on the measured strain signal and to randomly resample the stress history for variable amplitude fatigue tests.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Zhe Zhang, Bing Yang, Yuedong Wang, Shoune Xiao
Summary: This paper presents a method for designing fatigue life prediction models with small sample sizes by handling limited sample data. The method integrates the equivalent structural stress method with the maximum likelihood estimation method and adds reliability verification, resulting in enhanced goodness of fit, stability, and optimized sample quantity.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Cooper K. Hansen, Gary F. Whelan, Jacob D. Hochhalter
Summary: This paper presents a method to address the computational demand issue of computing FIPs using CPFEM by developing an interpretable machine learning model. Genetic programming is used to evolve interpretable expressions of FIPs from microstructure features, and these models can serve as efficient substitutes for CPFEM and be easily integrated into engineering workflows.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Luca Susmel
Summary: This paper discusses the problem of estimating notch fatigue limits using machine learning. The results show that machine learning is a promising approach for designing notched components against fatigue. The accuracy in estimating the fatigue limit can be increased by increasing the size and quality of the calibration dataset, as well as including additional input features.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Kefeng Gao, Guoqi Tan, Yanyan Liu, Qiang Wang, Qian Tang, Xuegang Wang, Qiqiang Duan, Zengqian Liu, Zhe Yi, Zhefeng Zhang
Summary: Bioinspired architectures have significant effects on material enhancement. This study investigates the fatigue properties of bioinspired ceramic-polymer composites and natural nacre, revealing the close relationship between architectural types, orientations, fatigue performance, and damage mechanisms.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)