Influence of structural features on processability, microstructures, chemical compositions, and hardness of selective laser melted complex thin-walled components

Yuan, Luhao; Gu, Dongdong; Lin, Kaijie; Ge, Qing; Shi, Xinyu; Wang, Haoran; Hu, Kai-Ming

doi:10.1007/s00170-020-05773-1

Cited by 15 publications

(3 citation statements)

References 48 publications

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“…When working, the head section is fixed and acts as a load-bearing element. Therefore, the cold forged tube must meet the following quality requirements in order to ensure the load-bearing capacity and connection reliability: (1) no underfilling defects or cracks should be present in the head section; (2) the hardness of the head section should be greater than that of the rod section, and both sections should have hardness values exceeding 300 HV.…”

Section: Forging Quality Requirementmentioning

confidence: 99%

“…Thin-walled tubes are extensively used in aviation, aerospace, and automobile industries since they are lightweight [ 1 , 2 , 3 ]; however, they are difficult to machine due to their weak mechanical properties. Generally, both warm and cold forging technologies are suitable for manufacturing thin-walled tubes, circumventing the aforementioned limitations.…”

Section: Introductionmentioning

confidence: 99%

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Analyzing Forged Quality of Thin-Walled A-286 Superalloy Tube under Multi-Stage Cold Forging Processes

et al. 2023

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Cold forging is suitable for manufacturing thin-walled tubes; however, a poorly planned forging process results in serious quality problems. This paper aims to determine an appropriate cold forging process for thin-walled A286 superalloy tube with ideal forming quality. We analyzed the effects of the two forging processes with reverse forging sequences on forming defects and hardness distribution in the thin-walled tubes via finite element simulation. The methods of optical microscope, micro-hardness, scanning electron microscope, and electron-backscattered diffraction were used to validate the tube forming quality. The simulation results revealed that the Type-I process was an appropriate forging process for meeting the quality requirements. For the Type-I process, an underfilling defect was observed at the bottom of the rod section of the tube. The stress concentration in the head section was lower than that in the Type-II process, potentially reducing the probability of crack initiation. Compared to the rod section, the head section may exhibit higher hardness magnitudes due to the greater strain distribution. The experimental results confirmed the feasibility of the Type-I process. The increased hardness in the head section may be primarily attributed to the more intense plastic deformation applied to the material in this section by the Type-I process.

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Section: Forging Quality Requirementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analyzing Forged Quality of Thin-Walled A-286 Superalloy Tube under Multi-Stage Cold Forging Processes

et al. 2023

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“…The aerospace field is progressively exhibiting the trend of high technology, intelligence, and integration as a result of the aerospace industry's rapid development, which has increased the technological level and production capacity requirements for the aerospace manufacturing sector [1]. More and more thin-walled complex structural parts are used in the structure of aerospace products in order to meet the demanding requirements of aircraft, spacecraft, and precision instruments on the performance and reliability of parts, and the precision requirements for such thin-walled structural parts are also rising [2]. Massive thin-walled structural components are increasingly used in the aerospace industry because they may effectively reduce the number of parts, drastically lower production costs, and well meet the objectives of overall structural lightweight design [3,4].…”

Section: Introductionmentioning

confidence: 99%

Optimized Design of Flexible Quick-Change System Based on Genetic Algorithm and Monte Carlo Method

Zhang

et al. 2023

Applied Sciences

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In order to realize the high efficiency and precision clamping of large workpieces with several processes and multiple species processing, the distribution number and position of the zero point clamping unit in the flexible quick-change process system for big thin-walled cylindrical structural parts are presented. The error model of the flexible quick-change process system is established by the Monte Carlo method, which is used to optimize the system structure design. The error variation of the flexible quick-change process system under the action of transposition and extreme working conditions such as cutting force is revealed, and further analysis on the sensitivity of the workpiece’s global displacement error and global attitude error to each error source is carried out. After the optimization, a high-quality, cost-effective, flexible quick-change clamping system is created. The three-coordinate measurement experiment is used to test the functionality and accuracy of the flexible quick-change process system. A significantly improved level of the system’s repetitive positioning accuracy (less than 0.01 mm) is detected. Importantly, the flexible quick-change system obtained by the combinatorial optimal design method has been successfully applied to the production of aerospace components with improved quality and efficiency.

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Mechanical behavior of 17-4 PH stainless steel processed by atomic diffusion additive manufacturing

Henry

Morales

Cole

et al. 2021

Int J Adv Manuf Technol

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Influence of structural features on processability, microstructures, chemical compositions, and hardness of selective laser melted complex thin-walled components

Cited by 15 publications

References 48 publications

Analyzing Forged Quality of Thin-Walled A-286 Superalloy Tube under Multi-Stage Cold Forging Processes

Analyzing Forged Quality of Thin-Walled A-286 Superalloy Tube under Multi-Stage Cold Forging Processes

Optimized Design of Flexible Quick-Change System Based on Genetic Algorithm and Monte Carlo Method

Mechanical behavior of 17-4 PH stainless steel processed by atomic diffusion additive manufacturing

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