A5063336828- Welding Techniques and Residual Stresses
- Additive Manufacturing Materials and Processes
- High Entropy Alloys Studies
- High-Temperature Coating Behaviors
- Advanced Welding Techniques Analysis
- Additive Manufacturing and 3D Printing Technologies
- Aluminum Alloys Composites Properties
- Metallurgy and Material Forming
- Genomics and Phylogenetic Studies
- Metal Forming Simulation Techniques
- Fluid Dynamics and Heat Transfer
- Numerical methods in engineering
- Advanced ceramic materials synthesis
- Magnesium Alloys: Properties and Applications
- Microbial Natural Products and Biosynthesis
- Aluminum Alloy Microstructure Properties
- Hydrocarbon exploration and reservoir analysis
- Particle Dynamics in Fluid Flows
Institute of Deep-Sea Science and Engineering
2025
Osaka University
2021-2024
Yanshan University
2022
It is of great importance to thoroughly understand residual stress distribution in wire arc additive manufacturing (WAAM) and its relationship with the deposition variables. In this study, stainless steels 308LSi 304 were used as WAAM feedstock substrate, respectively, for two typical structures, namely wall pipe structures. A thermomechanical coupling analysis model was developed investigate formation mechanism stresses both their height shape. The validity evaluated by comparing simulated...
Two new tetraene lactone derivatives (1 and 2), two α-pyrone (3 4), three compounds reported as natural products for the first time [an derivative (5), an indole-diketopiperazine alkaloid (6), a β-amino acid (8)], 11 known (7, 9-18), were obtained from microorganisms isolated hadal trench sediments in Pacific Ocean. Their structures determined using NMR, HRESIMS, optical rotatory dispersion (ORD) spectra, NMR calculations followed by DP4+ analysis, electronic circular dichroism (ECD)...
Cold spray (CS) is a highly potential solid-state additive manufacturing (AM) technique. In situ shot-peening-assisted CSAM was proposed to additively manufacture fully dense deposits using cost-effective and renewable nitrogen gas. The role of in shot-peening particles critical but remains unclear. Here, the process quantitatively modeled visualize dynamic deformation, energy conversion, as well cell/sub-grain size microhardness evolutions, compared those during conventional process,...
Low-transformation-temperature (LTT) materials induce compressive residual stresses within an effective depth in wire arc additive manufacturing (WAAM), which is well suited for cladding applications. However, this role was found to be sensitive the phase transformation sequence. We developed LTT material—16Cr8Ni (16Cr8Ni-LTT)—and explore its potential, it clad onto a KA36 substrate via WAAM. Three different interpass temperature strategies were designed as follows: (1) no control; (2)...
The present study revealed that a strong CoCrNi medium entropy alloy (MEA)/stainless steel (SS) joint could be obtained by friction welding technique with the formation of microscale interfacial layer composed varying degrees multi-principal element. A significant refinement in grain size to (∼2.8 µm) compared base metals (16.6 µm for MEA and 12.2 SS) was observed arising from co-occurrence continuous discontinuous dynamic recrystallisation where grains nucleated at triple boundaries, twin...
Cold spray (CS) has emerged as a representative of solid-state additive manufacturing (AM) via supersonic impact. It enables high deposition rate microparticles. Delamination, however, tends to occur when depositing too thick; this remains be conquered. Here, CS-like process, warm (WS), was presented. Interestingly, it found that the appropriate increase in particle temperature can effectively reduce residual stress amplitude, relieving concentrated tensile and safeguarding additively...
A new material model of magnesium alloys, combining both Hill’48 yield function and Cazacu’06 function, was developed programmed into LS-DYNA using user subroutine, in which slip dominant twinning/untwinning hardening phenomena were included. First, a cyclic load test performed, its finite element analysis carried out to verify the model. Then, deformation behaviors crash box subjected compressive impact loading investigated Compared with experimental results, accurately predicted...
The neck development for bore expansion problem is analyzed. Static implicit calculations are carried out the A2219 Aluminium alloy sheet using ABAQUS/Standard. equations to give conditions of onset localized necking metal based on general bifurcation theory presented plane stress. Since accurate calculation stresses and strains basis prediction, both associated non-associated flow rule adopted in material model which Hill’s quadratic functions used. User defined subroutine UMAT developed a...