Bulk nanostructured intermetallic alloys enable superb strength-ductility synergy and thermal stability

Bulk nanostructured intermetallic alloys enable superb strength-ductility synergy and thermal stability | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Physical Sciences - Article Bulk nanostructured intermetallic alloys enable superb strength-ductility synergy and thermal stability Tao Yang, Lijun Jing, Biao Xu, Yixiang Wang, Zhankun Zhao, Jian Cui, and 5 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6532309/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract Grain refinement down to the nanoscale can significantly enhance the strength of alloys but inevitably leads to serious plastic and thermal instability. The conventional design of bulk nanograined (NG) alloys is mainly relied on disordered solid solution systems and fails to overcome such a thorny challenge. Here, we innovatively engineer the nanostructured chemically complex intermetallic alloys (CCIMAs) dominated by an ordered superlattice structure. A bulk boundary-decorated bimodal nanostructured (BBN) CCIMA, composed of nano-subgrains and ultrafine grains with disordered interfacial nanolayers, was controllably synthesized by simple thermo-mechanical treatment. This newly designed alloy exhibits record-high yield strength-uniform elongation combinations of 1.83 GPa-14% and 2.19 GPa-13% at ambient and cryogenic temperatures, respectively. Such superb mechanical properties mainly stem from superlattice stacking faults (SSFs)-enhanced defect accumulation, therefore contributing to an exceptional work-hardening capability. Additionally, this alloy demonstrates an unexpected thermal resistance to grain coarsening at elevated temperatures up to 900 ℃. Our findings demonstrate an innovative approach to developing ultrahigh-performance NG alloys for extreme environments. Physical sciences/Materials science/Structural materials/Metals and alloys Physical sciences/Materials science/Nanoscale materials/Structural properties nanostructure intermetallic alloy mechanical behavior deformation mechanism thermal stability Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupplementaryInformation.pdf Supplementary Information Cite Share Download PDF Status: Under Review Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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