Simultaneous improvement in the strength and corrosion resistance of Al via high-energy ball milling and Cr alloying

Gupta, Rajeev; Fabijanic, Daniel; Dorin, Thomas; Qiu, Yao; Wang, Jiangting; Birbilis, Nick

doi:10.1016/j.matdes.2015.06.120

Cited by 52 publications

(24 citation statements)

References 33 publications

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“…For example, Cr has a low solubility in Al (maximum solubility is around 0.77 wt. %); 77 therefore, it is possible that several secondary phases or intermetallic compounds form in CCAs containing both Al and Cr, which could undermine the corrosion resistance of such CCAs. This aspect however needs to be clarified and balanced with any role Al may have in incorporation into surface films.…”

Section: Discussionmentioning

confidence: 99%

Corrosion of high entropy alloys

Qiu¹,

Thomas²,

Gibson³

et al. 2017

npj Mater Degrad

398

133

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High entropy alloys represent a unique class of metal alloys, comprising nominally five or more elements in near equiatomic proportions. High entropy alloys have gained significant interest on the basis that the high configurational entropy of such alloy systems is purported to result in a single-phase solid solution structure. While such a single-phase structure can occur in unique systems, it is now appreciated that the definition of high entropy alloys can be broader, with systems comprising only four elements possible of forming single phases, and most five (or more) element systems actually being multi (>2) phases. To this end, the notion of compositionally complex alloys is a more general description, with the concise review herein focusing on the corrosion of compositionally complex alloys (inclusive of high entropy alloys). It is noted that generally, in spite of complex compositions and in many cases complicated microstructural heterogeneity, compositionally complex alloys are nominally corrosion-resistant. This is discussed and aspects of the status and needs are presented.

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Section: Discussionmentioning

confidence: 99%

Corrosion of high entropy alloys

Qiu¹,

Thomas²,

Gibson³

et al. 2017

npj Mater Degrad

398

133

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“…Fig. 3 are produced by grain size reduction, solid solution, and precipitation hardening [45]. While our alloy has a lower yield strength value, it weighs less than the Al-Cr alloy thus having a higher specific strength and puts this alloy among the strongest lightweight alloys ever made.…”

Section: Grain Boundary Energy and Strengthening Effectmentioning

confidence: 97%

Nanocrystalline Al-Mg with extreme strength due to grain boundary doping

Pun

Wang

Khalajhedayati

et al. 2017

Materials Science and Engineering: A

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“…However, the sputter-deposited alloys were synthesized in the form of thin films, their mechanical properties were not well investigated, and up-scaling the production for bulk alloy production is challenging. Literature suggests that HEBM is also capable of producing alloys with extended solid solubility, nanocrystalline structure, and high strength [24][25][26][27]. For instance, solid solubility of Fe in Al was reported to increase to 4.5 wt.% (from 0.1%) due to HEBM [28].…”

mentioning

confidence: 99%

Excellent corrosion resistance and hardness in Al alloys by extended solid solubility and nanocrystalline structure

Esquivel

Murdoch

Darling

et al. 2017

Materials Research Letters

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Development of ultra-high strength and corrosion-resistant aluminum (Al) alloys is demonstrated by a combination of suitable alloying elements and processing technology able to cause extended solid solubility and nanocrystalline structure. Binary Al-transition metal (M: Cr, Ni, Mo, Si, Ti, Mn, V, Nb) alloys, produced by high-energy ball milling and subsequent cold compaction, have exhibited significantly high hardness and corrosion resistance compared to any commercial Al alloy. The cyclic potentiodynamic polarization tests revealed a significant improvement in pitting and repassivation potentials. X-ray diffraction analysis revealed the grain refinement < 100 nm and extended solid solubility. IMPACT STATEMENT High-energy ball-milled Al alloys, owing to excellent corrosion resistance and high hardness, are expected to be a new class of Al alloys and initiate a multidisciplinary research direction.

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Simultaneous improvement in the strength and corrosion resistance of Al via high-energy ball milling and Cr alloying

Cited by 52 publications

References 33 publications

Corrosion of high entropy alloys

Corrosion of high entropy alloys

Nanocrystalline Al-Mg with extreme strength due to grain boundary doping

Excellent corrosion resistance and hardness in Al alloys by extended solid solubility and nanocrystalline structure

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