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A dual-phase alloy with ultrahigh strength-ductility synergy over a wide temperature range

High-entropy alloys (HEAs), as an emerging class of materials, have pointed a pathway in developing alloys with interesting property combinations. Although they are not exempted from the strength-ductility trade-off, they present a standing chance in overcoming this challenge. Here, we report results for a precipitation-strengthening strategy, by tuning composition to design a CoNiV-based face-centered cubic/B2 duplex HEA. This alloy sustains ultrahigh gigapascal-level tensile yield strengths and excellent ductility from cryogenic to elevated temperatures. The highest specific yield strength (~150.2 MPa·cm3/g) among reported ductile HEAs is obtained. The ability of the alloy presented here to sustain this excellent strength-ductility synergy over a wide temperature range is aided by multiple deformation mechanisms i.e., twins, stacking faults, dynamic strain aging, and dynamic recrystallization. Our results open the avenue for designing precipitation-strengthened lightweight HEAs with ....

Natural Science Foundation Of Zhejiang Province , National Natural Science Foundation Of China , National Key Research , Research Funds For The Central Universities , Development Program Of China , Mettler Toledo , Shanghai Synchrotron Radiation , Zeiss Supra , Imaging Microscopy , Creative Commons Attribution Noncommercial , National Natural Science Foundation , Development Program , Natural Science Foundation , Zhejiang Province , Fundamental Research Funds , Central Universities ,

Interaction between Climatic Factors and Timescale Affect Assessment of Extreme Drought in China

Interaction between Climatic Factors and Timescale Affect Assessment of Extreme Drought in China
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Tibetan Plateau , China General , Natural Science Foundation Of China , Atmospheric Research , Institute Of Applied Ecology , National Key Research , Landscape Processes Group , Development Program Of China , Chinese Academy Of Sciences , Applied Ecology , Chinese Academy , Development Program , Natural Science Foundation ,