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Mechanical Engineering: Applications of Advanced Materials and Technologies

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Sustainable Materials".

Deadline for manuscript submissions: closed (15 January 2024) | Viewed by 985

Special Issue Editor

Department of Mechanical Engineering, Dhaka University of Engineering and Technology, Gazipur, Bangladesh
Interests: material science and engineering; nanotechnology; coating and coating technology; 2D materials; energy storage materials; tribology; addditive manufacturing; dental implant; methods and design

Special Issue Information

Dear Colleagues,

In different aspects of mechanical engineering, a variety of advanced materials are used. With the recent technological advancements, advanced materials are being replaced by conventional materials. Nano and biotechnology have been integrated with mechanical engineering systems and designs in a wide range of applications. Lightweight materials have been created with different structures for enhanced efficiency. In addition, 2D materials, functional materials, smart materials, shape memory alloys, phase change materials, naanocomposites, biopolymers, hydrogen storage materials, alloys and compounds, 3D printing materials, fibers and other advanced and novel materials according to the requirement of mechanical engineering applications have been synthesized and characterized. Coating processes are also used to change the properties of materials in real life applications. In this Special Issue, we will highlight the future prospects and challenges of these materials and their applications.

Prof. Dr. Mohammad Asaduzzaman Chowdhury
Guest Editor

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. Sustainability 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 2400 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

  • alloys and compounds
  • nanoparticles
  • 2D materials
  • smart materials
  • phase change materials
  • smart materials
  • shape memory alloys
  • phase change materials
  • functional materials
  • polymers and composites
  • energy storage materials
  • 3D printing materials
  • biomaterials
  • tribology
  • coating processes
  • advanced materials for different applications

Published Papers (1 paper)

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Research

25 pages, 4650 KiB  
Article
Sustainability through Optimal Compositional and Thermomechanical Design for the Al-7XXX Alloys: An ANOVA Case Study
Sustainability 2024, 16(4), 1515; https://doi.org/10.3390/su16041515 - 10 Feb 2024
Viewed by 518
Abstract
The quest for lightweight, high-performance structural materials for demanding applications such as in the fields of automotive, aerospace, and other high-tech and military industries pushes the boundaries of material science. The present work aims to draw attention to a novel, sustainable manufacturing approach [...] Read more.
The quest for lightweight, high-performance structural materials for demanding applications such as in the fields of automotive, aerospace, and other high-tech and military industries pushes the boundaries of material science. The present work aims to draw attention to a novel, sustainable manufacturing approach for the development of next-generation 7xxx series aluminum alloys that have higher strength by rejuvenating a sustainable compositional and thermomechanical processing strategy. Our innovative strategy integrates two key synergies: trace hafnium (Hf) addition for microstructural refinement, unique thermomechanical treatment involving cryorolling, and a short annealing method. Experimental results revealed that our base alloy exhibited a 33 µm grain size and impressive initial mechanical properties (334 MPa UTS, 150 HV). Adding 0.6 wt.% Hf and employing 50% cryorolling with short annealing led to a remarkable 10 µm grain size reduction and significant mechanical property leaps. The resulting alloy boasts a 452 MPa UTS and 174 HV, showcasing the synergistic advantageous effect of Hf and cryorolling plus annealing treatment. The developed alloys were compositional- and work hardening-dependent, leading to a rich mix of strengthening mechanisms. Optical and scanning electron microscopy reveal several intermetallic phases within the fcc matrix, wherein the Al3Hf phase plays a key role in strengthening by impeding dislocation movement. In addition to experimental results, a 12-full-factorial design experiment via ANOVA analysis was also utilized to validate the significant influence of Hf and cryorolling on properties with (p-values < 0.05). Among the different parameters, cryorolling plus annealing appeared as the most noteworthy factor, followed by the composition. Using the regression model, the ultimate tensile strength and hardness were predicted to be 626 MPa UTS and 192 HV for an alloy with 0.6 wt.% Hf and 85% cryorolling, which opens a new avenue for ultra-high-strength Al7xxx alloys. Full article
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