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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Microstructure, mechanical behavior and stress corrosion cracking susceptibility in ultrafine-grained Al-Cu alloy

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Author(s):
Braga, Diogo Pedrino [1] ; Camilo Magalhaes, Danielle Cristina [2] ; Kliauga, Andrea Madeira [2] ; Della Rovere, Carlos Alberto [2] ; Sordi, Vitor Luiz [2]
Total Authors: 5
Affiliation:
[1] Univ Fed Sao Carlos, Postgrad Program Mat Sci & Engn, PPGCEM UFSCar, Rod Washington Luis, Km 235, SP-310, Sao Carlos, SP - Brazil
[2] Fed Univ Sao Carlos UFSCar, Mat Engn Dept, Rod Washington Luis, Km 235, SP-310, Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING; v. 773, JAN 31 2020.
Web of Science Citations: 0
Abstract

Equal-channel angular pressing (ECAP) is capable of improving the mechanical properties of many aluminum alloys by means of intense grain refinement. Meanwhile, a general relationship between grain size and stress corrosion cracking (SCC) resistance is not yet established, since the introduction of microstructural heterogeneities affects, in many ways, the localized corrosion susceptibility. This work evaluates the simultaneous impact of ECAP processing on microstructure, mechanical strength and SCC resistance of an Al-4wt.%Cu alloy, in comparison with a commercially pure aluminum. Microstructure was observed by optical and electronic microscopy, while mechanical response was evaluated by hardness measurements and tensile tests. SCC resistance was evaluated by slow strain rate tests and by constant load tests performed in an aqueous solution with 3.5 wt.% NaCl. ECAP promoted grain refinement, breakdown/redistribution of coarse secondary phase particles and contributed to reduce the local chemical heterogeneity. Consequently, mechanical properties and SCC resistance were simultaneously improved. (AU)

FAPESP's process: 16/10997-0 - Mechanical processing of ultrafine-grained materials produced by severe plastic deformation
Grantee:Andrea Madeira Kliauga
Support Opportunities: Regular Research Grants