Enhanced strength and ductility in a high-entropy alloy via ordered oxygen complexes

Lei, Zhifeng; Liu, Xiong-Jun; Wu, Yuan; Wang, Hui; Jiang, Suihe; Wang, Shudao; Hui, Xidong; Wu, Yidong; Gault, Baptiste; Kontis, Paraskevas; Raabe, Dierk; Gu, Lin; Zhang, Qinghua; Chen, Houwen; Wang, Hongtao; Liu, Jiabin; An, Ke; Zeng, Qiaoshi; Nieh, T.G.; Liu, Xiongjun

doi:10.1038/s41586-018-0685-y

Cited by 1,227 publications

(316 citation statements)

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“…There are several strengthening mechanisms that can be triggered in metals by optimizing thermo-mechanical processing and/or composition, but many of them reduce ductility and toughness. Therefore, designing metals that exhibit simultaneous increases in these properties has been an essential goal of metallurgical research 2,[101][102][103][104] . The most effective mechanisms for improving strength and ductility simultaneously have been by phase metastability.…”

Section: Energy Efficiency By Lightweighting and Harsh Operating Condmentioning

confidence: 99%

Strategies for improving the sustainability of structural metals

Raabe

Taşan

Olivetti

2019

Nature

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411

143

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Metagoods 16% Vehicles 13% Industrial equipment 16% Construction 55% Re ne Smelter Mine Fabrication Manufacture Use New Scrap Old Scrap Land ll Carbon scrap/nickel to other scrap markets Stock End-of-life products c Transportation 19% Electronics 5% Chemicals 1% Industrial machinery 30% Household appliances and metal goods 28% Building and infrastructure17% Mine Rutile Mill product Ti ingot Manufacturing scrap Mill scrap End-of-life products Use Ferrotitanium Ti sponge TiO 2 feed TiCl 4

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Section: Energy Efficiency By Lightweighting and Harsh Operating Condmentioning

confidence: 99%

Strategies for improving the sustainability of structural metals

Raabe

Taşan

Olivetti

2019

Nature

Self Cite

411

143

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“…1 (data points A through E (refs. [22][23][24][25] ) and I 26 ). These HEAs 30 offer high σ y and ε u that are clearly superior to others.…”

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confidence: 98%

“…One therefore naturally wonders if concentrated alloys can offer (σ y , ε u ) beyond current benchmark ranges [12][13][14][15][16][17][18][19][20][21] . This proposition brings us to the so-called high-entropy alloys (HEAs), also called multi-principal component alloys or complexconcentrated alloys [22][23][24][25][26] . For a systematic introduction to this new paradigm recently emerged in metallurgy, the readers are referred to several review articles [27][28][29][30][31] .…”

mentioning

confidence: 99%

“…Heterogeneities in HEAs. Figure 2 highlights new schemes of nanostructured heterogeneities 22,23,26,33,[36][37][38][39] . Our intent here is to call the readers' attention to the multilevel heterogeneities enabled by HEAs, and explain how they influence dislocation motion to elevate σ y to the gigapascal level, while boosting strain hardening and retaining ε u that rivals simple metals.…”

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confidence: 99%

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Tailoring heterogeneities in high-entropy alloys to promote strength–ductility synergy

2019

Nat Commun

383

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Conventional alloys are usually based on a single host metal. Recent high-entropy alloys (HEAs), in contrast, employ multiple principal elements. The strength of HEAs is considerably higher than traditional solid solutions, as the many constituents lead to a rugged energy landscape that increases the resistance to dislocation motion, which can also be retarded by other heterogeneities. The wide variety of nanostructured heterogeneities in HEAs, including those generated on the fly during tensile straining, also offer elevated strain-hardening capability that promotes uniform tensile ductility. Citing recent examples, this review explores the multiple levels of heterogeneities in multi-principal-element alloys that contribute to lattice friction and back stress hardening, as a general strategy towards strength–ductility synergy beyond current benchmark ranges.

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“…Researchers from Institute of Metal Research, Chinese Academy of Sciences, introduced structure gradient of twin boundaries into a copper film by electrodeposition, which simultaneously enhanced strength and work hardening ( Figure ) . The strength–ductility trade‐off has also been successfully tackled in high entropy alloys recently by scientists from University of Science and Technology Beijing . By introducing certain amount of light atoms (O, C, B, and N) into TiZrHfNb alloy, they observed formation of ordered interstitial complexes, contributing to improvement of both strength and ductility.…”

Section: Osfu‐related Exploration For Improved Propertiesmentioning

confidence: 99%

Ordered Structures with Functional Units as a Paradigm of Material Design

Chen

2019

Advanced Materials

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applied in many fields such as information, energy, and security technologies. [4][5][6] It should be noted that we do not particularly introduce the research progress of metamaterials due to the limited length of the Essay, and readers can find many review articles in the literature. [7][8][9][10] Currently, most researches focus on the relationship between compositions/crystal structure and properties, but the effect of functional units/ordered structure on material properties has received relatively little consideration. If larger functional units instead of a single atom or molecule can be arranged and assembled in a certain order, this will lead to abnormal (exceptional) physical properties. There have been some reports on pursuing novel properties by designing and assembling functional units, which can be either artificial microstructures, or simply the natural domains, phases, twins, components or heterostructures of materials. Here, we will summarize these works and propose a "paradigm" of material research through designing and constructing ordered structures with functional units (OSFU). We hope to draw the attention of researchers to this OSFU concept, and promote the development of this strategy toward deeper understandings and broader applications. OSFU-Related Exploration for Improved Properties Optical PropertiesStructural colors are frequently found in animals or plants, which originate from light interfering with their sub-micrometer photonic structure features. The well-known examples include peacock feather, butterfly wing, and opal crystal. Researchers from MIT found the colored stripe of the bluerayed limpet results from the light interference with the photonic architecture embedded limpet shell. [11] The OSFUscalcite lamellae in this case are stacked in a co-orientated manner forming periodically layered zig-zag architecture. The photonic multilayer system serves as an optical interference filter to produce the strong blue reflection. Scientists at University of Geneva studied the active color change in chameleons (Figure 1). [12] It was demonstrated that there are two layers of dermal iridophores with functional units of guanine nanocrystals arranged in a triangular lattice underneath the epidermis, and the arrangement of these OSFUs is responsible for the color change. When a chameleon is relaxed, the functional guanine nanocrystals are closely spaced with a small Realizing new functions through the construction of ordered structures not only exists naturally in nature, but also in artificial materials. However, much research focuses more on the relationship between structure and performance rather than on the impact of functional units themselves. Reviewing previous research findings, a "paradigm" of material research is proposed, which is based on ordered structures with functional units (OSFU) such as compositions, phases, domains, and twins. The goal is to draw more intensive attention of researchers to this concept and thus to promote the development of this field toward a deeper and ...

show abstract

Enhanced strength and ductility in a high-entropy alloy via ordered oxygen complexes

Cited by 1,227 publications

References 54 publications

Strategies for improving the sustainability of structural metals

Strategies for improving the sustainability of structural metals

Tailoring heterogeneities in high-entropy alloys to promote strength–ductility synergy

Ordered Structures with Functional Units as a Paradigm of Material Design

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