Microstructure and Properties in Metals and Alloys, 3rd Volume

Topic Information

Dear Colleagues,

Following the two previous topic volumes (Microstructure and Properties in Metals and Alloys, volumes 1 and 2), this new topic is a collection of research contributions that explores the crucial role of microstructure design in achieving desired material properties. This Topic focuses on the relationship between microstructure and mechanical properties, fatigue resistance, wear resistance, and corrosion resistance in metals and alloys. This Topic also welcomes contributions related to welding processes. By providing a comprehensive overview of the interplay between microstructure and properties, this resource serves as a valuable reference for researchers and engineers working in materials science, aiming to enhance microstructure design and optimize properties for different applications.

Dr. Andrea Di Schino
Dr. Claudio Testani
Prof. Dr. Robert Bidulský
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Alloys alloys	-	-	2022	15.0 days *	CHF 1000	Submit
Coatings coatings	3.4	4.7	2011	13.8 Days	CHF 2600	Submit
Crystals crystals	2.7	3.6	2011	10.6 Days	CHF 2600	Submit
Materials materials	3.4	5.2	2008	13.9 Days	CHF 2600	Submit
Metals metals	2.9	4.4	2011	15 Days	CHF 2600	Submit

* Median value for all MDPI journals in the second half of 2023.

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Published Papers (2 papers)

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All Alloys Coatings Crystals Materials Metals

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14 pages, 3201 KiB  

Open AccessArticle

First-Principles Study on Thermodynamic, Structural, Mechanical, Electronic, and Phonon Properties of tP16 Ru-Based Alloys

by Bhila Oliver Mnisi, Moseti Evans Benecha and Malebo Meriam Tibane

Alloys 2024, 3(2), 126-139; https://doi.org/10.3390/alloys3020007 - 15 Apr 2024

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Abstract

Transition metal-ruthenium alloys are promising candidates for ultra-high-temperature structural applications. However, the mechanical and electronic characteristics of these alloys are not well understood in the literature. This study uses first-principles density functional theory calculations to explore the structural, electronic, mechanical, and phonon properties [...] Read more.

Transition metal-ruthenium alloys are promising candidates for ultra-high-temperature structural applications. However, the mechanical and electronic characteristics of these alloys are not well understood in the literature. This study uses first-principles density functional theory calculations to explore the structural, electronic, mechanical, and phonon properties of X₃Ru (X = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) binary alloys in the tP16 crystallographic phase. We find that Mn₃Ru, Sc₃Ru, Ti₃Ru, V₃Ru, and Zn₃Ru have negative heats of formation and hence are thermodynamically stable. Mechanical analysis (C_ij) indicates that all tP16-X₃Ru alloys are mechanically stable except, Fe₃Ru and Cr₃Ru. Moreover, these compounds exhibit ductility and possess high melting temperatures. Furthermore, phonon dispersion curves indicate that Cr₃Ru, Co₃Ru, Ni₃Ru, and Cu₃Ru are dynamically stable, while the electronic density of states reveals all the X₃Ru alloys are metallic, with a significant overlap between the valence and conduction bands at the Fermi energy. These findings offer insights into the novel properties of the tP16 X₃Ru intermetallic alloys for the exploration of high-temperature structural applications. Full article

(This article belongs to the Topic Microstructure and Properties in Metals and Alloys, 3rd Volume)

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23 pages, 14268 KiB  

Open AccessArticle

Optimizing Tensile Properties and Hardness of Inconel 718 by Cold Rolling

by Wakshum Mekonnen Tucho, Anders Thon Sletsjøe, Navid Sayyar and Vidar Hansen

Metals 2024, 14(4), 455; https://doi.org/10.3390/met14040455 - 12 Apr 2024

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Abstract

The as-received commercial Inconel 718 material was solid solution heat treated (ST), cold-rolled (CR), and precipitation-hardened (PH) to investigate the effects of deformation on the tensile properties, hardness, and texture. Three sets of specimens (0%, 20%, and 50% CR) were ST at 1100 [...] Read more.

The as-received commercial Inconel 718 material was solid solution heat treated (ST), cold-rolled (CR), and precipitation-hardened (PH) to investigate the effects of deformation on the tensile properties, hardness, and texture. Three sets of specimens (0%, 20%, and 50% CR) were ST at 1100 °C/1 h, CR, and aged (720 °C/8 h + 650 °C/8 h) for the analysis. The ultimate tensile strength (UTS), 0.2% yield strength (YS), and elongation of 50% deformed condition were 1645 MPa, 1512 MPa, and 3.8%, respectively. The 20% deformation resulted in a balanced UTS (1348 MPa), YS (1202 MPa), and elongation (11%). The contribution of precipitation hardening to the strength decreased, while the contribution of CR increased with an increasing percentage of deformation. As the level of deformation increased, the size and quantity of γ″ decreased proportionally. The CR specimens produced a high density of nano/micro twins with twin planes oriented perpendicular to the RD-ND surface. The gradient of crystal orientation and internal features of large austenitic grains were generated by their preferred rotation. The cross-slip of screw dislocations induced a complete β-fiber consisting of {110}<112>, {112}<111>, and {123}<634>, with doubled intensity at the higher deformation. Additionally, the specimens were highly susceptible to the twinning-induced orientation emerged by a predominant <110>//ND. In the as-deformed condition, an incomplete but intense α-fiber, clustered between {110}<001> and {110}<112>, was characterized. Apart from achieving the highest strength, the current work demonstrates the effects of CR on the material strength without the complex influences of δ precipitates. Full article

(This article belongs to the Topic Microstructure and Properties in Metals and Alloys, 3rd Volume)

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