Effects of W micro-additions on precipitation kinetics and mechanical properties of an Al-Mn-Mo-Si-Zr-Sc-Er alloy

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:803

Article

Shu, Shipeng¹  Luca, Anthony De^1,2  Dunand, David C.¹  Seidman, David N.^1,3 

[1] Northwestern Univ, Dept Mat Sci & Engn, 2220 Campus Dr, Evanston, IL 60208 USA

[2] Empa, Swiss Fed Labs Mat Sci & Technol, Lab Adv Mat Proc, Uberlandstr 129, CH-8600 Dubendorf, Switzerland

[3] Northwestern Univ, Ctr Atom Probe Tomog, 2220 Campus Dr, Evanston, IL 60208 USA

关键词: Aluminum alloys;    Precipitation kinetics;    Atom-probe tomography;    Elevated-temperature;   

DOI  :  10.1016/j.msea.2020.140550

来源: Elsevier

【 摘 要 】

A micro-addition (0.025 at.%) of slow-diffusing W to an Al-0.26Mn-0.11Mo-0.11Si-0.08Zr-0.02Sc-0.01Er (at.%) alloy accelerates L1(2)-Al-3(Zr,Sc) precipitation but retards alpha-Al(Mn,Mo)Si precipitation. The W micro-addition increases the peak-microhardness of the alloy during isothermal aging but does not improve the coarsening resistance and creep resistance.

【 授权许可】

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