Mechanical Behavior and Strengthening Mechanisms in Ultrafine Grain Precipitation-Strengthened Aluminum Alloy
TL;DR: In this article, the relationship between precipitation phenomena, grain size and mechanical behavior in a complex precipitation-strengthened alloy system, Al 7075 alloy, a commonly used aluminum alloy, was selected as a model system in the present study.
About: This article is published in Acta Materialia.The article was published on 2014-01-01. It has received 995 citations till now. The article focuses on the topics: Strengthening mechanisms of materials & Precipitation hardening.
Citations
More filters
TL;DR: In this paper, the authors demonstrate the possibility to precipitate a coherent reinforcing phase in a fcc-FeCoNiCr HEA matrix using minor additions of Ti and Al, and demonstrate that extraordinary balanced tensile properties at room temperature were achieved, which was due to a well combination of various hardening mechanisms, particularly precipitation hardening.
1,486 citations
Additional excerpts
...15 modulus mismatch (Δσ ) and atomic ordering (Δσ ) [39-41]....
[...]
TL;DR: In this paper, the microstructures of HESAs consisting of γ and γ′ phases are similar to that of Ni-base superalloys and refractory HEAs.
441 citations
TL;DR: In this paper, a comprehensive review on important micro-structural evolutions and major microstructural features induced by SPD processing in single-phase metallic materials with face-centered cubic structures, body-centered cylindrical structures, and hexagonal close-packed structures, as well as in multi-phase alloys is provided.
Abstract: Bulk nanostructured (ns)/ultrafine-grained (UFG) metallic materials possess very high strength, making them attractive for high strength, lightweight and energy efficient applications. The most effective approach to produce bulk ns/UFG metallic materials is severe plastic deformation (SPD). In the last 30 years, significant research efforts have been made to explore SPD processing of materials, SPD-induced microstructural evolutions, and the resulting mechanical properties. There have been a few comprehensive reviews focusing mainly on SPD processing and the mechanical properties of the resulting materials. Yet no such a review on SPD-induced microstructural evolutions is available. This paper aims to provide a comprehensive review on important microstructural evolutions and major microstructural features induced by SPD processing in single-phase metallic materials with face-centered cubic structures, body-centered cubic structures, and hexagonal close-packed structures, as well as in multi-phase alloys. The corresponding deformation mechanisms and structural evolutions during SPD processing are discussed, including dislocation slip, deformation twinning, phase transformation, grain refinement, grain growth, and the evolution of dislocation density. A brief review on the mechanical properties of SPD-processed materials is also provided to correlate the structure with mechanical properties of SPD-processed materials, which is important for guiding structural design for optimum mechanical properties of materials.
349 citations
TL;DR: In this paper, the design, phase formation, microstructure, mechanical behavior and strengthening mechanisms of a single-phase Co 25 Ni 25 Fe 25 Al 7.5 Cu 17.5 (at.%) high-entropy alloy (HEA) were investigated.
331 citations
TL;DR: In this article, a high strength in-process and post-process friendly Al alloy was developed for the selective laser melting (SLM) process, one of the most commonly used additive manufacturing techniques.
265 citations
References
More filters
TL;DR: In this paper, the authors used a Geiger counter spectrometer to measure the changes in intensity distribution in the spectra of cold worked aluminium and wolfram and found that the line breadths may be attributed to simultaneous small particle size and strain broadening, the latter predominating at the higher Bragg angles.
7,802 citations
01 Sep 1951
TL;DR: In this paper, an attempt is made to explain the observed phenomena in the yielding and ageing of mild steel, described in two previous papers, in the general terms of a grain-boundary theory.
Abstract: An attempt is made here to explain the observed phenomena in the yielding and ageing of mild steel, described in two previous papers, in the general terms of a grain-boundary theory. On this hypothesis, a satisfactory explanation of the variation of the lower yield point with grain size may be developed. It is shown that strain-ageing must involve two processes: a healing of the grain-boundary films, coupled with a hardening in the grains themselves. A discussion of the possible nature of the grain-boundary film is also undertaken.
5,893 citations
TL;DR: In this article, the authors summarize the basic physical concepts and the microstructural features of equilibrium and non-equilibrium nanostructured materials (NsM) and make an attempt to summarize their properties.
2,629 citations
Book•
01 Jan 1990
TL;DR: The ASM Handbook as discussed by the authors provides a comprehensive and authoritative single-volume reference on nonferrous metals and alloys, with particular emphasis on aluminum, titanium, copper, and magnesium.
Abstract: The most comprehensive and authoritative single-volume reference on nonferrous metals and alloys. Provides detailed information on major alloy groups, with particular emphasis on aluminum, titanium, copper, and magnesium. New topics include recycling, superconductors, metal-matrix composites, and intermetallics. Contents include: Specific Metals and Alloys, Special-Purpose Alloys, Superconducting Materials, Pure Metals, Recycling, and Toxicity of Metals. This is the second of two volumes in the ASM Handbook that present information on compositions, properties, selection, and applications of metals and alloys. In Volume 1, irons, steels, and superalloys are described. In the volume, nonferrous alloys, superconducting materials, pure metals, and materials developed for use in special applications are reviewed. These companion volumes document some of the more important changes and developments that have taken place in materials science during recent decadesuchanges that undoubtedly will continue to impact materials engineering into the 21st century.
2,620 citations
"Mechanical Behavior and Strengtheni..." refers background or methods in this paper
...Basically, the presence of a high number density of GP zones and fine g0-phase precipitates is responsible for the strengthening of the material [6,10]....
[...]
...Atom-probe tomography (APT) [28–32] was utilized to characterize the intermetallic precipitates and oxide dispersoids in the UFG 7075 on an atomic scale; this advanced technique determines the elemental identity and position of individual atoms with sub-nanometer resolution in three dimensions (3-...
[...]
TL;DR: The near-comprehensive range of import filters that allow easy access to image and meta-data, a broad suite processing and analysis routine, and enthusiastic support from a friendly mailing list are invaluable for all microscopy labs and facilities-not just those on a budget.
Abstract: of short add-on programs to provide additional functionality to the core program. These additional files are either written in Java (the plugins) or in ImageJ’s macro programming language (macros). Once saved to the ImageJ plugins folder, these functions are loaded on start-up and can be accessed via menu commands like any other core function. 400+ PLUGINS
1,775 citations