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Development of New Metallic Materials via Macrodesign of Microstructure

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A special issue of Metals (ISSN 2075-4701).

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 7093

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Special Issue Editors

Prof. Dr. Kehong Wang

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Guest Editor

Key Laboratory of Controlled Arc Intelligent Additive Manufacturing Technology, Nanjing University of Science and Technology, Nanjing 210094, China
Interests: additive manufacturing; welding; heterogeneous structure; mechanical property

Prof. Dr. Yong Peng

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Guest Editor

Dr. Jizi Liu

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Guest Editor

Nano and Heterogeneous Materials Center, School of Materials Science & Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Interests: metals and alloys; microstructure; mechanical property; defects; TEM; APT; EBSD

Special Issue Information

Dear Colleagues,

The need for multifunction metallic materials has become pressing with the boom of several industries. However, it is very difficult for single structural elements to deal with the conflict between different properties and performances, such as strength vs. toughness, elevated temperature property vs. structural stability, lightweight vs. protective performance, and so on. The latest research shows that the macrodesign of microstructures by means of additive manufacturing is one of the most effective approaches to achieve an excellent overall performance, which has attracted extensive attention in both science and engineering.

This Special Issue aims to present a collection of articles of cutting-edge research on the “Development of New Metallic Materials Via Macrodesign of Microstructure by Means of Additive Manufacturing (AM)”, as regards improved property and performance, innovative technology, the micromechanics behind the microstructure evolution, even deformation and failure behavior. Using state-of-the-art technologies, the relationship between mechanical properties and microstructures, as well as the law of microstructural design and optimization, will be uncovered. Mechanical behavior and failure mode could be quite different for microstructures designed via additive manufacturing at multiscale, owing to the variation of fundamental mechanisms that control the dislocation moving in different microstructures or through the heterogeneous interface, under the coupling of complex heterogeneous structures. Through deep discussions and ongoing studies, the underlying microcosmic laws behind the marodesign of additive manufacturing will be better explored, which will of assistance to the additive manufacturing engineering of the materials for new properties and performances.

Original research articles and reviews with a focus on the following topics are welcome for submission.

New metallic materials with advanced properties and performances fabricated by AM;
Microstructures and/or mechanical response of materials produced by AM;
State-of-the-art techniques on characterization of AM materials at multiscale;
Theoretical and computational modeling of materials prepared by AM;
Experimental, theoretical, and modeling studies on the structure design of metallic materials via AM processes.

Prof. Dr. Kehong Wang
Prof. Dr. Yong Peng
Prof. Dr. Jizi Liu
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. Metals is an international peer-reviewed open access monthly 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

Additive manufacturing
Microstructure
Mechanical property
hetero- structure
Welding
Metals and alloys
Macrodesign
Deformation
Failure

Published Papers (4 papers)

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Research

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17 pages, 20442 KiB

Open AccessArticle

Investigation of Microstructure and Mechanical Properties of Layered Material Produced by Adding Al₂O₃ to 316L Stainless Steel

by Osama Albahl Alshtewe Albahlol, Rajab Elkilani, Harun Çuğ, Mehmet Akif Erden, Ramazan Özmen and Ismail Esen

Metals 2023, 13(7), 1226; https://doi.org/10.3390/met13071226 - 3 Jul 2023

Cited by 4 | Viewed by 1433

Abstract

This study developed new advanced composite materials consisting of functional grading of 316L and Al₂O₃ specially designed for potential biomedical applications. Mechanical properties were characterized by tensile testing, and microstructural properties by optical microscope, scanning electron microscope (SEM), and Energy Dispersive X-Ray (EDX) analyses. The uniform mixture in the material, up to 40% by weight of Al₂O_3, is uniformly distributed in the 316L matrix that shows disintegration. Then, samples with 2, 3, 4, and 5 layers were produced in functionally graded 6, 7, 8, and 9 material types, respectively. The layer thicknesses were formed with an average of 900 µm. The results show that new composite materials can be produced functionally using 316L and Al₂O₃ in a layered manner. As a result of the mechanical experiments, it has been observed that the tensile strength of the layered composite structures remains within the range of 91–191 MPa, depending on the layer type. It has been observed that the elongation varies between 3.16 and 12.46%. According to these results, the materials obtained are considered suitable for use as an alternative prosthetic material in biomedical applications. The tensile strength, % elongation of the Composition 7, and yield strength of functionally graded (316 + (316L-10 Al₂O₃) + (316L-20 Al₂O₃) + (316L-30 Al₂O₃)) material are 123 megapascals (MPa), 7.3%, and 111MPa, respectively, and according to the literature, the mechanical strength of human bone is very close to this composition properties. Full article

(This article belongs to the Special Issue Development of New Metallic Materials via Macrodesign of Microstructure)

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13 pages, 7273 KiB

Open AccessArticle

Effect of Solution Temperature on Tension-Compression Asymmetry in Metastable β-Titanium Alloys

by Yong Wen, Jun Wang, Shiyun Duan and Cong Li

Metals 2022, 12(8), 1352; https://doi.org/10.3390/met12081352 - 15 Aug 2022

Viewed by 1148

Abstract

Three titanium alloys, Ti-10V-1Fe-3Al, Ti-10V-2Fe-3Al and Ti-10V-2Cr-3Al, were heated by solution treatment at in 700 °C (α + β phase region), 800 °C (near β phase region), 900 °C and 1000 °C (single β phase region). The effects of solution temperature on the microstructure and mechanical properties of the alloys were studied, and the mechanical asymmetry of tension and compression of three titanium alloys was analyzed; the results show that the microstructure of the three alloys changes regularly with the increase of solution temperature. Different solution temperatures have a significant effect on the compressive and tensile properties of the three alloys. During compression deformation, the stress-induced martensite transformation occurs in samples with solution at 800 °C and above; however, there is no phase transformation during the process of tensile tests. The asymmetry of yield strength, work hardening rate and final strength of the three alloys are obvious during compression deformation and tensile deformation. The difference in the number of twins between uniaxial tension and uniaxial compression, the presence or absence of stress-induced martensitic transformation, and the CRSS asymmetry of cone <c + a> slip may be the reasons for the asymmetry of mechanical properties. Full article

(This article belongs to the Special Issue Development of New Metallic Materials via Macrodesign of Microstructure)

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15 pages, 5372 KiB

Open AccessArticle

Research on High-Temperature Compressive Properties of Ti–10V–1Fe–3Al Alloy

by Cong Li, Can Huang, Zhili Ding and Xing Zhou

Metals 2022, 12(3), 526; https://doi.org/10.3390/met12030526 - 21 Mar 2022

Cited by 2 | Viewed by 1519

Abstract

To investigate the thermal deformation behavior of Ti–10V–2Cr–3Al titanium alloy, the hot compression experiments were carried out via a strain rate of 0.1–0.001 s⁻¹ and deformation temperature of 730~880 °C. The results showed that the rheological stress decreases when the deformation temperature increases or strain rate decreases. Due to the deformation conditions, some flow curves exhibited significant discontinuous yielding and flow softening. Flow softening in the α+β phase region was dominated by dynamic recrystallization (DRX), while in the β phase region, it was centered on dynamic recovery (DRV). A high-temperature constitutive equation, with good predictive power, was established. Full article

(This article belongs to the Special Issue Development of New Metallic Materials via Macrodesign of Microstructure)

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Review

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13 pages, 5301 KiB

Open AccessReview

Problems in Welding of High Nitrogen Steel: A Review

by Lei Wang, Yichen Li, Jialiang Ding, Qiang Xie, Xiaoyong Zhang and Kehong Wang

Metals 2022, 12(8), 1273; https://doi.org/10.3390/met12081273 - 28 Jul 2022

Cited by 6 | Viewed by 2325

Abstract

High nitrogen steel (HNS) has an excellent tensile strength and impact property due to the solid solution strengthening of nitrogen, which provides a good application prospect in many fields. Fusion welding is one of the main processing methods of HNS, but the process is prone to spatters, serious nitrogen losses, N₂ porosities, and poor performances of joints, resulting in the failure of large-scale engineering applications of HNS. In this work, the development of HNS welding is reviewed, and the problems including the droplet transfer instability, N₂ porosities, nitrogen losses and poor mechanical properties due to high nitrogen content are discussed. According to previous welding experiences, the adoption of a welding method with a low heat input is proposed, which utilizes powders instead of wires, optimizes compositions in the shielding gas and feeding materials in order to solve the above problems, and improves the mechanical properties of the weld. Full article

(This article belongs to the Special Issue Development of New Metallic Materials via Macrodesign of Microstructure)

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