Alloy Design and Its Performance Trade-Offs

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

Deadline for manuscript submissions: 15 December 2024 | Viewed by 1069

Special Issue Editor


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Guest Editor
Brunel Centre for Advanced Solidification Technology (BCAST), Brunel University London, Uxbridge UB8 3PH, UK
Interests: alloy design and development; thermomechanical processing; casting; quasicrystals

Special Issue Information

Dear Colleagues,

Alloy design can be a crucial step in developing advanced metallic materials, directly affecting their performance and application. Balancing properties such as strength, ductility, formability, and conductivity is essential for creating high-performance alloying systems. Modern metallurgy focuses on enhancing these properties simultaneously through innovative manufacturing processes and thermomechanical treatments. Understanding the relationships between alloy chemistry, microstructural features, and processing parameters is key to achieving optimal performance. Recent research in this field has allowed for significant advancements, particularly in nanostructured metallic materials and advanced thermomechanical processing techniques. These developments have important implications for alloy design and optimization, offering improved performance across various applications.

This Special Issue aims to present the latest research on alloy design and performance trade-offs. Topics of interest include novel alloy systems, the effects of processing techniques on properties, the role of microstructure in performance, and strategies for balancing conflicting properties through experimental and computational platforms. Specific areas of focus are high-entropy and nanostructured alloys, thermomechanical processing, grain refinement, solid solution strengthening, precipitation hardening, and computational methods for the design and optimization of new alloys. We welcome manuscript submissions to this Special Issue that cover these topics.

Dr. Seyedmehdi Hosseini
Guest Editor

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Keywords

  • alloy design
  • performance trade-offs
  • manufacturing process
  • thermomechanical treatment
  • alloy chemistry
  • microstructural features
  • solid solution strengthening
  • precipitation hardening
  • computational methods

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Published Papers (1 paper)

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Research

19 pages, 11907 KiB  
Article
Examination of Novel Titanium-639 Alloy as a Means of Balancing Strength and Ductility through Molybdenum Addition Rather than Prolonged Aging Heat Treatment
by Shiraz Mujahid, Alireza Fadavi Boostani, YubRaj Paudel, Andrew Oppedal, Bhasker Paliwal, Hongjoo Rhee and Haitham El Kadiri
Metals 2024, 14(7), 828; https://doi.org/10.3390/met14070828 - 18 Jul 2024
Viewed by 833
Abstract
Manufacturing titanium alloys with simultaneous enhancement in strength and ductility has motivated extensive research into various strategies for regulating the arrangement and texture of α and β phases. The present study explores a novel α + β titanium alloy, TIMETAL 639 (Ti-639), produced [...] Read more.
Manufacturing titanium alloys with simultaneous enhancement in strength and ductility has motivated extensive research into various strategies for regulating the arrangement and texture of α and β phases. The present study explores a novel α + β titanium alloy, TIMETAL 639 (Ti-639), produced by replacing a portion of vanadium in Ti-64 with molybdenum. The low diffusivity and β-stabilizing effects of molybdenum help retain bimodal characteristics within solution heat-treated Ti-639 microstructures. EBSD and TEM were used to examine β-phase evolution after thermal processing and recrystallization of new globular α grains within pre-existing colonies in a depleted bimodal microstructure. These depleted bimodal colonies in solution heat-treated Ti-639 also led to lower misorientation spreads and dislocation densities within neighboring primary α grains. Quasi-static compression along the plate normal direction demonstrated the ability of the depleted bimodal microstructure to simultaneously enhance strength and ductility in Ti-639 (~90 MPa stronger, ~6% higher failure strain) versus identically processed Ti-64. Only one solution heat-treatment step (1 h at 900 °C) is needed to achieve these properties in Ti-639, whereas comparable properties in Ti-64 required prolonged aging heat treatment (24 h at 600 °C) after the same solution heat-treatment step, making Ti-639 a viable α + β alloy candidate. Full article
(This article belongs to the Special Issue Alloy Design and Its Performance Trade-Offs)
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