Research progress of lightweight metallic materials and their processing technologies for modern transportation

Laser-based Direct Energy Deposition (L-DED) is a very quick and freeform fabrication process. L-DED is useful to fabricate near net shape for engineering applications as well as medical applications. L-DED has been successful in making a variety of pure metals and its alloys for industrial needs. This review paper gives an overview of the research progress in various types of metallic materials like nickel alloys, Stainless Steel (SS), and Functionally Graded Materials (FGMs) fabricated by L-DED. Simultaneously, the effects of process parametric related factors also discussed. Introduction about nickel alloys, Stainless Steel, and FGMs relevant findings, and their advantages and disadvantages for these alloys are communicated. The paper shows the metallurgical, mechanical properties, and post-processing effects on L-DED fabricated nickel alloys, SS, and FGMs. This paper will be helpful to the researchers and industrialists and for those who are interested to do research in this field.

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Special Issue: Mechanical Properties in Progressive Mechanically Processed Metallic Materials

Materials ◽

10.3390/ma13204668 ◽

2020 ◽

Vol 13 (20) ◽

pp. 4668

Author(s):

Radim Kocich ◽

Lenka Kunčická

Keyword(s):

Mechanical Properties ◽

Physical Parameters ◽

Metallic Materials ◽

Special Issue ◽

Processing Technologies ◽

Recent Developments ◽

Metallic Composites ◽

Materials Used ◽

High Level ◽

Alloys And Compounds

The research and development of modern metallic materials imparts not only the introduction of innovative alloys and compounds, but also the increasing lifetime of existing materials via optimized deformation processing. Among the essential features of progressive metallic materials used for modern applications are enhanced mechanical properties, but also other high-level functional characteristics, such as thermal–physical parameters, corrosion rate, and electric resistance. The properties of materials and alloys ensue from their structures, which can primarily be affected by the preparation/production process. The Special Issue “Mechanical Properties in Progressive Mechanically Processed Metallic Materials” was established to present recent developments and innovations particularly in the engineering field. The Special Issue comprises papers dealing with modern materials, such as metallic composites and pseudoalloys, as well as developments in various processing technologies.

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Influences of Sn on Properties of Ag-Based and Cu-Based Brazing Filler Metals

Crystals ◽

10.3390/cryst11111403 ◽

2021 ◽

Vol 11 (11) ◽

pp. 1403

Author(s):

Qingcheng Luo ◽

Songbai Xue ◽

Jie Wu

Keyword(s):

Mechanical Properties ◽

Melting Point ◽

Research And Development ◽

Research Progress ◽

Metallic Materials ◽

Gap Filling ◽

Industrial Manufacturing ◽

Melting Characteristics ◽

Almost All ◽

Filler Metals

Ag-based and Cu-based brazing filler metals, which are the most widely used brazing materials in industrial manufacturing, have excellent gap-filling properties and can braze almost all the metallic materials and their alloys, except for the low-melting-point metals such as Al and Mg. Therefore, Ag-based and Cu-based brazing filler metals have attracted great attention. In this review, three series of typical Ag-based filler metals: the Ag-Cu, Ag-Cu-Zn, and Ag-Cu-Zn-Sn alloys; and three series of Cu-based filler metals: the crystalline and amorphous Cu-P filler metals, as well as the Cu-Zn filler metals, were chosen as the representatives. The latest research progress on Sn-containing Ag-based and Cu-based brazing filler metals is summarized, and the influences of Sn on the melting characteristics, wettability, microstructure, and mechanical properties of the selected filler metals are analyzed. Based on these, the problems and corresponding solutions in the investigation and application of the Sn-containing Ag-based and Cu-based filler metals are put forward, and the research and development trends of these filler metals are proposed.

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Preparation of Rigid Polyurethane Foam and Research Progress of its Reinforced Technology by Inorganic Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.562-564.385 ◽

2012 ◽

Vol 562-564 ◽

pp. 385-389

Author(s):

Ming Ming Cheng ◽

Fei Wang ◽

Lin Jing Ma ◽

Chao Fan

Keyword(s):

Thermal Conductivity ◽

Polyurethane Foam ◽

Thermal Insulation ◽

Light Quality ◽

Inorganic Materials ◽

Research Progress ◽

Rigid Polyurethane Foam ◽

Processing Technologies ◽

Low Thermal Conductivity

Rigid polyurethane foam has many advantages such as low thermal conductivity, good thermal insulation, good antisepsis ability, non-toxic, and light quality. Based on the above reasons, this paper systematically summarized the processing technologies of rigid polyurethane foam, and research progress of its reinforced technology by inorganic materials was briefly discussed.

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Nanostructured Ti2448 Biomedical Titanium Alloy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.633-634.535 ◽

2009 ◽

Vol 633-634 ◽

pp. 535-547 ◽

Cited By ~ 1

Author(s):

Yu Lin Hao ◽

Shi Jian Li ◽

M.L. Sui ◽

Rui Yang

Keyword(s):

Titanium Alloy ◽

Grain Refinement ◽

Second Phase ◽

Metallic Materials ◽

Dispersion Strengthening ◽

Dislocation Interaction ◽

Processing Technologies ◽

Biomedical Titanium Alloy ◽

Low Efficiency ◽

Localized Plastic Deformation

It is generally accepted that grain refinement by the mechanisms of dislocation interaction, deformation twinning and/or stress-induced martensitic transformation is of relatively low efficiency. Rapid production of nanostructured metallic materials by conventional processing technologies remains a challenge. A new mechanism of fast grain refinement, through highly localized plastic deformation, was recently found in a -type biomedical titanium alloy (Ti2448). This mechanism leads to rapid grain refinement to tens nanometers and even amorphous transition during conventional cold processing. Since such grain refinement induces little strengthening, this process was previously termed soft nanostructuring. Here we review the research into this new way of nanostructuring and discuss the mechanism of grain refinement as well as dispersion strengthening of Ti2448 alloy by the precipitation of a second phase from the nano-sized  matrix.

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Research Progress of Femtosecond Laser Microhole Drilling on Non-Metallic Materials

Laser & Optoelectronics Progress ◽

10.3788/lop57.111417 ◽

2020 ◽

Vol 57 (11) ◽

pp. 111417

Author(s):

杜坤 Du Kun ◽

李晓炜 Li Xiaowei ◽

杨炳东 Yang Bingdong ◽

张超 Zhang Chao ◽

夏博 Xia Bo

Keyword(s):

Femtosecond Laser ◽

Research Progress ◽

Metallic Materials

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Situation and Development on Soil Corrosion of Metallic Materials of HVDC Power Transmission Project

Materials Science Forum ◽

10.4028/www.scientific.net/msf.852.218 ◽

2016 ◽

Vol 852 ◽

pp. 218-225 ◽

Cited By ~ 1

Author(s):

An Xiang Guo ◽

Wei Juan Hu ◽

Ai Jun Yan ◽

Zhi Qiang Yang ◽

La Jun Feng

Keyword(s):

High Power ◽

Power Transmission ◽

Research Direction ◽

Research Progress ◽

Metallic Materials ◽

Buried Pipeline ◽

Stray Current ◽

Soil Corrosion ◽

Hvdc System ◽

Corrosion Research

UHVDC transmission could deliver high-power electricity over long distances effectively, while the DC stray current led to corrosion of grounding device and the surrounding buried metal during the operation inevitably. This paper reviewed the research progress of HVDC corrosion at home and abroad in recent years. It elaborated corrosion research direction of HVDC system from three aspects, which were pole, grounding grid and the neighboring tower grounding body buried pipeline respectively. Describing the anti-corrosion measures on grounding devices and buried pipeline, and explaining the advantages and defects of various anti-corrosion technology. At last, we proposed that it was necessary to expand the research in UHVDC field, grasp the erosion rule of DC stray current in soil comprehensively to enhance the security of UHVDC transmission system of national grid.

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The Effect of Laser Parameters on Cutting Metallic Materials

Materials ◽

10.3390/ma13204596 ◽

2020 ◽

Vol 13 (20) ◽

pp. 4596

Author(s):

Seungik Son ◽

Dongkyoung Lee

Keyword(s):

Multiple Regression ◽

High Precision ◽

Laser Cutting ◽

Continuous Wave ◽

Process Quality ◽

High Tech ◽

Metallic Materials ◽

Processing Technologies ◽

Laser Parameters

This experimental study investigated the effect of laser parameters on the machining of SS41 and SUS304. The metallic materials play an important role in engineering applications. They are widely used in high-tech industries such as aerospace, automotive, and architecture. Due to the development of technology and high-tech industrialization, the various processing technologies are being developed with the requirement of high precision. However, the conventional cutting process is difficult to meet high precision processing. Therefore, to achieve high precision processing of the SS41 and SUS304, laser manufacturing has been applied. The current study investigated the process quality of laser cutting for SS41 and SUS304, with the usage of a continuous wave CO2 laser cutting system. The experimental variables are set to the laser cutting speed, laser power, and different engineering materials. The results are significantly affected by the laser parameters. As the result, the process quality of the laser cutting has been observed by measuring the top and bottom kerf widths, as well as the size of the melting zone and Heat Affected Zone (HAZ) according to volume energy. In addition, the evaluation of the laser processing parameters is significantly important to achieve optimal cutting quality. Therefore, we observed the correlation between the laser parameters and cutting quality. These were evaluated by analysis of variance (ANOVA) and multiple regression analysis. The experimental results of kerf top, kerf bottom, melting width, and HAZ on the laser parameters are properly predicted by multiple regression. In addition, the effect of laser parameters on the materials is determinant by the percentage of contribution of ANOVA.

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