A highly distorted ultraelastic chemically complex Elinvar alloy View Full Text


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Article Info

DATE

2022-02-09

AUTHORS

Q. F. He, J. G. Wang, H. A. Chen, Z. Y. Ding, Z. Q. Zhou, L. H. Xiong, J. H. Luan, J. M. Pelletier, J. C. Qiao, Q. Wang, L. L. Fan, Y. Ren, Q. S. Zeng, C. T. Liu, C. W. Pao, D. J. Srolovitz, Y. Yang

ABSTRACT

The development of high-performance ultraelastic metals with superb strength, a large elastic strain limit and temperature-insensitive elastic modulus (Elinvar effect) are important for various industrial applications, from actuators and medical devices to high-precision instruments1,2. The elastic strain limit of bulk crystalline metals is usually less than 1 per cent, owing to dislocation easy gliding. Shape memory alloys3—including gum metals4,5 and strain glass alloys6,7—may attain an elastic strain limit up to several per cent, although this is the result of pseudo-elasticity and is accompanied by large energy dissipation3. Recently, chemically complex alloys, such as ‘high-entropy’ alloys8, have attracted tremendous research interest owing to their promising properties9–15. In this work we report on a chemically complex alloy with a large atomic size misfit usually unaffordable in conventional alloys. The alloy exhibits a high elastic strain limit (approximately 2 per cent) and a very low internal friction (less than 2 × 10−4) at room temperature. More interestingly, this alloy exhibits an extraordinary Elinvar effect, maintaining near-constant elastic modulus between room temperature and 627 degrees Celsius (900 kelvin), which is, to our knowledge, unmatched by the existing alloys hitherto reported. More... »

PAGES

251-257

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41586-021-04309-1

DOI

http://dx.doi.org/10.1038/s41586-021-04309-1

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1145390846

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/35140390


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18 schema:description The development of high-performance ultraelastic metals with superb strength, a large elastic strain limit and temperature-insensitive elastic modulus (Elinvar effect) are important for various industrial applications, from actuators and medical devices to high-precision instruments1,2. The elastic strain limit of bulk crystalline metals is usually less than 1 per cent, owing to dislocation easy gliding. Shape memory alloys3—including gum metals4,5 and strain glass alloys6,7—may attain an elastic strain limit up to several per cent, although this is the result of pseudo-elasticity and is accompanied by large energy dissipation3. Recently, chemically complex alloys, such as ‘high-entropy’ alloys8, have attracted tremendous research interest owing to their promising properties9–15. In this work we report on a chemically complex alloy with a large atomic size misfit usually unaffordable in conventional alloys. The alloy exhibits a high elastic strain limit (approximately 2 per cent) and a very low internal friction (less than 2 × 10−4) at room temperature. More interestingly, this alloy exhibits an extraordinary Elinvar effect, maintaining near-constant elastic modulus between room temperature and 627 degrees Celsius (900 kelvin), which is, to our knowledge, unmatched by the existing alloys hitherto reported.
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24 schema:keywords Celsius
25 Elinvar alloys
26 Elinvar effect
27 actuators
28 alloy
29 applications
30 atomic size misfit
31 bulk crystalline metals
32 cent
33 complex alloys
34 constant elastic modulus
35 conventional alloys
36 crystalline metals
37 degrees Celsius
38 development
39 devices
40 easy gliding
41 effect
42 elastic modulus
43 elastic strain limit
44 friction
45 glass
46 gliding
47 gum
48 high elastic strain limit
49 hitherto
50 industrial applications
51 interest
52 internal friction
53 knowledge
54 large elastic strain limit
55 larger atomic size misfit
56 limit
57 low internal friction
58 medical devices
59 metals
60 misfit
61 modulus
62 research interest
63 results
64 room temperature
65 size misfit
66 strain limit
67 strength
68 superb strength
69 temperature
70 tremendous research interest
71 work
72 schema:name A highly distorted ultraelastic chemically complex Elinvar alloy
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