Forging of Metals and Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: 10 October 2024 | Viewed by 1483

Special Issue Editors

College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
Interests: forging; plastic deformation; semi-solid forging
Light Alloy Research Institute, Central South University, Changsha 410083, China
Interests: light alloys; aluminum alloys; steel; microstructure characterization; forming

Special Issue Information

Dear Colleagues,

Known to be amongst the oldest known metalworking processes, forging is a manufacturing process which involves the shaping of metal using localized compressive forces. As the metallic billet is shaped plastically during the forging process, microstructural evolution behaviors including grain refinement, texture variation, and compound discretization occur simultaneously. As a result, forged components exhibit better mechanical properties than the components manufactured by equivalent casting or machining. Since the Industrial Revolution, forging techniques have been widely applied in manufacturing metallic components with high requirement for strength. Nowadays, the exploration of human beings into space, the deep sea and polar regions requires the use of innovative equipment consisting of high-quality components. On the one hand, components with a complex geometric structure and large volume are designed. On the other hand, advanced structural materials with ultra-high mechanical properties were developed. Thus, the process, die, and equipment of forging should be improved to realize capacity for the extreme manufacturing of components with extreme geometric structure, extreme performance, and extreme material.

The scope of the current Special Issue embraces interdisciplinary works aimed at understanding and deploying plastic deformation mechanisms of metals, multi-scale behaviors of metals during forging, advancing experimental and theoretical forging analysis, the innovative structural design and fabrication of forging die, and the application of improved forging equipment. Manuscripts will be welcomed from both fundamental scientific researchers and authors belonging to industrial companies involved in the field.

Dr. Yi Meng
Dr. Sheng Ding
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.

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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

  • plastic deformation
  • microstructural evolution
  • die forging
  • multi-scale simulation, fabrication of forging die
  • high-strength aluminum alloy
  • high-strength titanium alloy
  • high-strength steel

Published Papers (2 papers)

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Research

22 pages, 3487 KiB  
Article
The Influence of Hot Deformation on the Mechanical and Structural Properties of 42CrMo4 Steel
by Mariana Pop, Ioana-Monica Sas-Boca, Dan Frunză, Florin Popa and Adriana Neag
Metals 2024, 14(6), 647; https://doi.org/10.3390/met14060647 - 29 May 2024
Viewed by 168
Abstract
The influence of elevated temperatures and strain rate on the mechanical and structural properties of steel 42CrMo4 were analysed experimentally in this paper. The experiments were based on uniaxial tension and compression tests at high temperatures between 700 °C and 1100 °C and [...] Read more.
The influence of elevated temperatures and strain rate on the mechanical and structural properties of steel 42CrMo4 were analysed experimentally in this paper. The experiments were based on uniaxial tension and compression tests at high temperatures between 700 °C and 1100 °C and strain rates in the range 0.0018–0.1 s1. The influence of temperature and strain rate on yield stress, strain to fracture, hardness, structural changes, and fracture characteristics were analysed. The non-uniformity of deformations obtained at different values of the strain rate and temperature were also analysed. Analysis by scanning electron microscopy showed the ductile behaviour of the material. The degree of damage in the material caused by the presence of cavities increased with increasing deformation temperature. For all the presented deformation conditions, the formation of the fracture through the ductile fracture mechanism resulted from localized necking and the coalescence of microvoids. By increasing the deformation temperature and reducing the strain rate, the fracture behaviour of 42CrMo4 steel can be improved. Full article
(This article belongs to the Special Issue Forging of Metals and Alloys)
14 pages, 8994 KiB  
Article
Effect of Deep Cryogenic Time on the Microstructure and Mechanical Property of Cr-Mn-Si High-Strength Alloy Steel
by Jingyu Zhang, Haian Mao, Yi Meng, Rong Shi and Jiamin Fang
Metals 2023, 13(8), 1449; https://doi.org/10.3390/met13081449 - 11 Aug 2023
Viewed by 979
Abstract
Cr-Mn-Si alloyed high-strength steel was subjected to deep cryogenic treatment after quenching and tempering (Q-T), and the microstructure and property evolution of the alloy steel after deep cryogenic treatment were studied. The tensile strength increased by about 30 MPa, the yield strength decreased [...] Read more.
Cr-Mn-Si alloyed high-strength steel was subjected to deep cryogenic treatment after quenching and tempering (Q-T), and the microstructure and property evolution of the alloy steel after deep cryogenic treatment were studied. The tensile strength increased by about 30 MPa, the yield strength decreased by about 10 MPa, and the grains of alloy steel were refined, indicating that the strength and toughness of the alloy steel can be relatively improved via the deep cryogenic treatment (−120 °C × 1 h); the secondary carbides precipitated inside the martensitic matrix were uniformly distributed; and the average size was also significantly reduced, presenting a more uniform microstructure than that of the Q-T samples. Furthermore, the dislocation density of alloy steel also evolved during the deep cryogenic treatment, with the highest dislocation density after the 2 h treatment, thus providing a dislocation-strengthening effect. Therefore, the overall properties of the alloyed steel could be comprehensively improved by the deep cryogenic treatment after Q-T. Full article
(This article belongs to the Special Issue Forging of Metals and Alloys)
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