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Bing Zhou

Bio: Bing Zhou is an academic researcher from Yantai University. The author has contributed to research in topics: Grain boundary & Powder metallurgy. The author has an hindex of 3, co-authored 5 publications receiving 16 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the temperature and stress profiles of porous cubic Ti-6Al-4V titanium alloy grids by additive manufacturing via electron beam melting (EBM) based on finite element (FE) method were investigated.

13 citations

Journal ArticleDOI
TL;DR: In this article, the microstructural evolution and mechanical properties of powder metallurgy (PM) Ti-22Al-24Nb-0.5Mo prepared by combination of hot isostatic pressing (HIP), ring rolling, and heat treatment were investigated.

9 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the fatigue behavior of single-lap four-riveted aluminum alloy 7050 joints by using high-frequency fatigue test and scanning electron microscope (SEM).
Abstract: The fatigue behavior of single-lap four-riveted aluminum alloy 7050 joints was investigated by using high-frequency fatigue test and scanning electron microscope (SEM). Stress distributions obtained by finite element (FE) analysis help explain the fatigue performance. The fatigue test results showed that the fatigue lives of the joints depend on cold expansion and applied cyclic loads. FE analysis and fractography indicated that the improved fatigue lives can be attributed to the reduction in maximum stress and evolution of fatigue damage at the critical location. The beneficial effects of strengthening techniques result in tearing ridges or lamellar structure on fracture surface, decrease in fatigue striations spacing, delay of fatigue crack initiation, crack deflection in fatigue crack propagation and plasticity-induced crack closure.

8 citations

Journal ArticleDOI
TL;DR: In this article, the microstructures of doped tungsten deformed by multi-pass hot continuous rolling were investigated, and the stress and strain fields were simulated by finite element (FE) method.
Abstract: The microstructures of doped tungsten deformed by multi-pass hot continuous rolling were investigated, and the stress and strain fields were simulated by finite element (FE) method. After the continuous rolling, the grains of the tungsten rod were refined, and the microhardness was improved; however, a ring region of abnormal grain growth was present at a distance of about 3/5R (R is the radius of the rod) from the center of the cross section. FE modeling results showed that the equivalent residual strains were minimum around the region of abnormal grain growth; this was due to the release of strain energy by severe plastic deformation, leading a situation where the migration force of grain boundaries was higher than the pinning force of potassium bubbles. By decreasing the initial rolling temperature and rolling speeds, the inhomogeneity of the equivalent residual stain decreased, improving the microstructure uniformity of the doped tungsten.

6 citations

Journal ArticleDOI
TL;DR: In this paper, the hot deformation behavior and microstructural evolution of Ti-22Al-24Nb-0.5Mo alloy were investigated by compression test in the temperature range of 930°C to 1050°C and strain rate range of 0.001−1 s−1.

2 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the anisotropy in the mechanical properties of additively-manufactured materials is still poorly understood and the authors aimed at elucidating crystallographic feature-anisotropic-mechanical property relationship for a Ti-6Al-4V alloy manufactured via selective electron beam melting.

21 citations

Journal ArticleDOI
TL;DR: In this paper, a novel Spark Plasma Sintering (SPS) of pre-alloyed powder followed by a hot packed rolling method is proposed to fabricate the Ti2AlNb sheet.
Abstract: In this work, a novel “spark plasma sintering (SPS) of pre-alloyed powder followed by a hot packed rolling” method is proposed to fabricate the Ti2AlNb sheet. Ti2AlNb sheets with high tensile strength and good ductility are obtained without any post heat treatment. Ti2AlNb compact is first prepared by SPS of the pre-alloyed powders. The compact sintered at 1060 °C consists of only B2 phases with an average grain size of 25.88 μm. No α2 phase forms after rolled at 1030 °C and the B2 grain size increases by increasing the rolling passes because of the fast grain growth of B2 grains. Numerous ultrafine O phases precipitated inside the B2 matrix after cooled in air, and they contribute to the excellent strength and ductility of the sheets. The mechanical property tests showed that the sheets rolled by 2 passes (thickness reduction: 42% + 42%) and 4 passes (30% + 21% + 21% + 21%) had the maximum tensile strength of 1239.03 MPa and the maximum elongation of 9.49%, respectively. All the rolled sheets presented ductile fracture mode with numerous dimples on the fracture surface.

20 citations

Journal ArticleDOI
TL;DR: In this paper , the relationship between welding quality and energy consumption was investigated by optimizing process parameters during the 2 mm thickness 6061 aluminum alloy laser welding, and the Non-dominated Sorting Genetic Algorithm-III (NSGA-III) was utilized to minimize energy consumption while maintaining good welding quality.
Abstract: Laser welding, a key and competitive technology for advanced industrial manufacturing is powered by energy. With increasing attention to energy management and environmental protection in manufacturing, reducing energy consumption is imperative. However, the traditional optimization of laser welding has been mainly focused on welding quality without considering the total energy consumption of all components. Thus, this paper researches the relationship between welding quality and energy consumption by optimizing process parameters during the 2 mm thickness 6061 aluminum alloy laser welding. Firstly, a three-factor, three-level experiment using Central Composite Design (CCD) is constructed. Secondly, Kriging models are employed to construct the models between process parameters and objectives. Finally, the Non-dominated Sorting Genetic Algorithm-III (NSGA-III) is utilized to minimize energy consumption while maintaining good welding quality. The study shows that compared to the initial scenario, optimization can reduce energy consumption while increasing welding quality.

14 citations

Journal ArticleDOI
TL;DR: This study aims to focus on electron beam melted titanium (Ti)-based orthopaedic implants along with their recent trends in the field to explore their different aspects for future research opportunities.
Abstract: Purpose Human aging is becoming a common issue these days as it results in orthopaedic-related issues such as joints disorderness, bone-fracture. People with age = 60 years suffer more from these aforesaid issues. It is expected that these issues in human beings will ultimately reach 2.1 billion by 2050 worldwide. Furthermore, the increase in traffic accidents in young people throughout the world has significantly emerged the need for artificial implants. Their implantation can act as a substitute for fractured bones or disordered joints. Therefore, this study aims to focus on electron beam melted titanium (Ti)-based orthopaedic implants along with their recent trends in the field. Design/methodology/approach The main contents of this work include the basic theme and background of the metal-based additive manufacturing, different implant materials specifically Ti alloys and their classification based on crystallographic transus temperature (including α, metastable β, β and α + β phases), details of electron beam melting (EBM) concerning its process physics, various control variables and performance characteristics of EBMed Ti alloys in orthopaedic and orthodontic implants, applications of EBMed Ti alloys in various load-bearing implants, different challenges associated with the EBMed Ti-based implants along with their possible solutions. Recent trends and shortfalls have also been described at the end. Findings EBM is getting significant attention in medical implants because of its minor issues as compared to conventional fabrication practices such as Ti casting and possesses a significant research potential to fabricate various medical implants. The elastic modulus and strength of EBMed ß Ti-alloys such as 24Nb-4Zr-8Sn and Ti-33Nb-4Sn are superior compared to conventional Ti for orthopaedic implants. Beta Ti alloys processed by EBM have near bone elastic modulus (approximately 35–50 GPa) along with improved tribo-mechanical performance involving mechanical strength, wear and corrosion resistance, along with biocompatibility for implants. Originality/value Advances in EBM have opened the gateway Ti alloys in the biomedical field explicitly ß-alloys because of their unique biocompatibility, bioactivity along with improved tribo-mechanical performance. Less significant work is available on the EBM of Ti alloys in orthopaedic and orthodontic implants. This study is directed solely on the EBM of medical Ti alloys in medical sectors to explore their different aspects for future research opportunities.

13 citations

Journal ArticleDOI
TL;DR: In this article, the influence of squeeze force and initial fit tolerance on the fatigue property of a riveted aircraft lap joint was analyzed under six levels of fatigue loads and the results showed that an initially oversized rivet might be detrimental to fatigue-life improvement.

12 citations