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Application of Advanced Forming and Repairing Remanufacturing Technologies (Additive Manufacturing...
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Application of Advanced Forming and Repairing Remanufacturing Technologies (Additive Manufacturing and Surface Engineering) in Metals

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (31 January 2022) | Viewed by 10789

Special Issue Editors

Prof. Dr. Zhiguo Chen

E-Mail Website
Guest Editor
1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Hunan University of Humanities, Science and Technology, Loudi 417000, China
Interests: physical metallurgy of light alloys; additive manufacturing and surface engineering
Dr. Yonggang Tong

E-Mail Website
Guest Editor
College of Automobile and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410076, China
Interests: remanufacturing technology; surface engineering and high entropy alloys

Special Issue Information

Dear Colleagues,

Repairing remanufacturing is the industrialization of high-tech maintenance to the waste productions and getting growing attention in recent years. Its aim is to renew the original size of the waste components rapidly, and simultaneously improve their service performance. Consistent with the sustainable development strategy, repairing remanufacturing is a kind of green technology with superior quality, high efficiency, energy and materials saving. Advanced surface engineering and other forming technologies are the critical elements for remanufacturing engineering. Currently the surface technologies, such as thermal spraying, electric-brush plating, and electro-spark deposition, are widely employed for the local repair of components. Other additive manufacturing methods based on the arc, plasma, and laser high density heat source, such as wire arc additive manufacture, micro-arc plasma forming technology and laser cladding, are also developed and play an increasingly important role.

This Special Issue of Materials will publish original experimental and theoretical work related to application of advanced additive manufacturing and surface engineering technologies for green remanufacturing.

It is our pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Dr. Zhiguo Chen
Dr. Yonggang Tong
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • remanufacturing
  • additive manufacturing
  • surface engineering
  • laser cladding
  • thermal spraying
  • electric-brush plating
  • wire arc additive manufacture
  • electro-spark deposition

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Published Papers (4 papers)

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Research

19 pages, 6201 KiB  
Article
Simulation Analysis and Process Evaluation of Cooling Hole Forming Precision in Mask Assisted Electrochemical Machining Based on GH4169
by Zhaolong Li and Ye Dai
Materials 2022, 15(5), 1973; https://doi.org/10.3390/ma15051973 - 7 Mar 2022
Cited by 3 | Viewed by 2444
Abstract
Good heat dissipation performance of aero-engine an effectively improve the service performance and service life of aero-engine. Therefore, this paper studies the machining method of cooling holes of high-temperature existent material GH 4169 for aero-engine innovatively puts forward the mask electrochemical machining method [...] Read more.
Good heat dissipation performance of aero-engine an effectively improve the service performance and service life of aero-engine. Therefore, this paper studies the machining method of cooling holes of high-temperature existent material GH 4169 for aero-engine innovatively puts forward the mask electrochemical machining method of cooling holes and explores the entrance morphology and taper formation law of the hole structure of high-temperature resistant material GH 4169. The mathematical model of anode dissolution of cooling holes in ECM is established, and the influence of voltage and electrolyte flow rate on cooling holes in ECM is analyzed. Compared with the mask-less electrochemical machining, the inlet radius of cooling holes in mask electrochemical machining is reduced by about 16.0% and the taper is reduced by 52.8% under the same machining parameters, which indicates that the electrochemical machining efficiency of mask is higher and the machining accuracy is better. Experiments show that the diameter of the mask structure improves the accuracy of the inlet profile of the cooling hole in the ECM. The diameter of the mask increases from 2 mm to 2.8 mm, and the inlet radius of the cooling hole increased from 1.257 mm to 1.451 mm When the diameter of the mask is 2.2 mm, the taper of the cooling hole decreased by 53.4%. The improvement effect is best, and the thickness of the mask has little influence on the forming accuracy of the cooling hole. Full article
(This article belongs to the Special Issue Application of Advanced Forming and Repairing Remanufacturing Technologies (Additive Manufacturing and Surface Engineering) in Metals)
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10 pages, 5417 KiB  
Article
Wear-Resistant TiC Strengthening CoCrNi-Based High-Entropy Alloy Composite
by Yanlin Cai, Yonggang Tong, Yongle Hu, Hongfeng Huang, Xiancheng Zhang, Manyu Hua, Shan Xu, Yongbing Mei, Chengbiao Ma and Zhifeng Li
Materials 2021, 14(16), 4665; https://doi.org/10.3390/ma14164665 - 19 Aug 2021
Cited by 11 | Viewed by 3035
Abstract
In order to improve the wear resistance of CoCrNi alloy, TiC was introduced into the alloy and wear-resistant CoCrNi/(TiC)x composites were designed. The effects of TiC contents on the microstructure, mechanical properties, and wear resistance of CoCrNi matrix were investigated, respectively. It [...] Read more.
In order to improve the wear resistance of CoCrNi alloy, TiC was introduced into the alloy and wear-resistant CoCrNi/(TiC)x composites were designed. The effects of TiC contents on the microstructure, mechanical properties, and wear resistance of CoCrNi matrix were investigated, respectively. It was found that the TiC produced dissolution and precipitation process in CoCrNi alloy, and a large number of needled and blocky TiC particles were precipitated in the composites. The compressive yield strength of CoCrNi/(TiC)x composites increased with the increasing TiC content. Compared with the CoCrNi alloy, the yield strength of CoCrNi/(TiC)x composites increased from 108 to 1371 MPa, and the corresponding strengthening mechanism contributed to the second phase strengthening. The wear resistance of CoCrNi/(TiC)x composites was also greatly improved due to the strengthening of TiC. Compared with the CoCrNi alloy, the specific wear rate of CoCrNi/(TiC)1.0 alloy was reduced by about 77%. The wear resistance of CoCrNi/(TiC)x composites was enhanced with the increasing content of TiC addition. Full article
(This article belongs to the Special Issue Application of Advanced Forming and Repairing Remanufacturing Technologies (Additive Manufacturing and Surface Engineering) in Metals)
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12 pages, 4680 KiB  
Article
Microstructure and Mechanical Properties of Wire Arc Additively Manufactured MoNbTaWTi High Entropy Alloys
by Jian Liu, Jing Li, Xian Du, Yonggang Tong, Rui Wang, Dongyu He, Zhihai Cai and Haidou Wang
Materials 2021, 14(16), 4512; https://doi.org/10.3390/ma14164512 - 11 Aug 2021
Cited by 21 | Viewed by 2575
Abstract
High-temperature resistant high-entropy alloys (HEAs) have attracted extensive attention due to their excellent thermodynamic stability and mechanical properties, especially at high temperatures. However, a highly effective method for large-size HEAs is still desirable but challengeable. This research reported a facile yet effective strategy [...] Read more.
High-temperature resistant high-entropy alloys (HEAs) have attracted extensive attention due to their excellent thermodynamic stability and mechanical properties, especially at high temperatures. However, a highly effective method for large-size HEAs is still desirable but challengeable. This research reported a facile yet effective strategy for MoNbTaWTi HEAs via in-situ wire arc additive manufacturing (WAAM). The wire was MoNbTaWTi cable-type welding wire (CTWW) consisting of one center wire and seven twisted peripheral wires. Then, additive manufacturing of MoNbTaWTi high entropy alloys (HEAs) was accomplished, and various analytical techniques studied the microstructures and mechanical properties of the overlaying formed layers. X-ray diffraction showed the overlaying formed layers to contain a single disordered BCC solid solution phase with high-temperature structural stability. In addition, the single-phase BCC structure was maintained from 0 to 1400 °C. The bottom of the overlaying formed layers was made of columnar cellular structure, and the upper part resembled “cauliflower-like” fine dendrite and equiaxed crystal structure. The hardness of the overlaying formed layers averaged 533 HV0.2 at room temperature. At 1000 °C, the hardness was around 110 HV1, close to the value of Inconel 718 alloy (125 HV1). The compressive strength of the overlaying formed alloy layers displayed no sensitivity towards change in temperature from 500 to 1000 °C. As the temperature rose from 500 to 1000 °C, the compressive strength changed from 629 to 602 MPa, equivalent to only a 27 MPa decrease. The latter was much higher than the strength of Inconel 718 alloy at the same temperature (200 MPa). Full article
(This article belongs to the Special Issue Application of Advanced Forming and Repairing Remanufacturing Technologies (Additive Manufacturing and Surface Engineering) in Metals)
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13 pages, 4839 KiB  
Article
Elasto-Plastic Fracture Mechanics Analysis of the Effect of Shot Peening on 300M Steel
by Shuai Hou, Zhihai Cai, Youli Zhu, Qizhi Zhao, Yong Chen, Han Gao, Hongbo Wang and Jing Li
Materials 2021, 14(13), 3538; https://doi.org/10.3390/ma14133538 - 25 Jun 2021
Cited by 3 | Viewed by 1840
Abstract
A modified J-integral calculation method is adopted to fix the problem of the quantitative evaluation of the crack propagation of shot-peened structures. Considering the residual stress, residual strain, and residual strain energy, the effect of shot peening on the J-integral parameters of semi-elliptic [...] Read more.
A modified J-integral calculation method is adopted to fix the problem of the quantitative evaluation of the crack propagation of shot-peened structures. Considering the residual stress, residual strain, and residual strain energy, the effect of shot peening on the J-integral parameters of semi-elliptic surface crack fronts is quantitatively calculated and a method is provided for the performance evaluation of the shot peening layer. First, the shot peening process is simulated, then the fatigue crack is generated by changing the constraint condition and a far-field load is applied to calculate the J-integral parameters, crack propagation rate, and crack kinking angle. The effects of different crack depths and shot velocities on the fracture parameters are analyzed. The results show that the reduction in the J-integral value after shot peening decreases with the increase in the crack depth when the shot velocity is a certain value, which indicates that shot peening is more beneficial for suppressing the fatigue crack propagation. When the crack depth is greater than the depth of the compressive stress layer, shot peening accelerates the crack propagation. The reduction in the J-integral value decreases with the increase in shot velocity when the crack depth is a certain value; therefore, increasing shot velocity is more beneficial for retarding fatigue crack propagation. Full article
(This article belongs to the Special Issue Application of Advanced Forming and Repairing Remanufacturing Technologies (Additive Manufacturing and Surface Engineering) in Metals)
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