CRITERIA FOR THE SELECTION OF THE FIRST STAGE OF AGING IN ALLOY 6013 OF THE Al-Mg-Si-Cu SYSTEM

Сбитнева, С. В.; Лукина, Е. А.

doi:10.18411/vntr2019-141-3

BSTD

2019

DOI: 10.18411/vntr2019-141-3

|View full text |Cite

CRITERIA FOR THE SELECTION OF THE FIRST STAGE OF AGING IN ALLOY 6013 OF THE Al-Mg-Si-Cu SYSTEM

С. В. Сбитнева¹,

Е. А. Лукина²

Abstract: In the work, on the basis of the analysis of the phase transformations diagram for singlestage aging and temperature-time mechanical and corrosive properties for sheets of alloy 6013, it was established that the maximal values of the strength of the propertiescorrespond toa high tendency to intercrystalline corrosion. In order to improve the complex properties of sheets of alloy 6013 applied two-stage aging. Based on the analysis of the dependencies of the mechanical properties of sheets from alloy 6013 on tem… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2021

2022

Publication Types

Select...

Article2

Relationship

Self Cite0

Independent2

Authors

Journals

Cited by 2 publications

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Avials, history of creation and overview of future outlook

Sinchuk¹

2021

Metalozn. obrobka met.

View full text Add to dashboard Cite

Scientific domestic and foreign literature touching the field of Al – Mg – Si wrought aluminum alloys are reviewed, the history of appearance of the most common brands is described. It is shown that the development of alloys was proceed gradually advancing their chemical composition along the quasi-binary Mg/Si = 1.73 сross -section in the direction of increasing concentration of just Mg and Si, and the strength of last modern brands was provided by additional alloying, primarily copper, the content of which can reach 1-1.4%. The influence of alloying elements on microstructure, mechanical and corrosion properties of alloys is described, features of their heat treatment, factors of maximum strengthening and susceptibility to intergranular corrosion are revealed. Attention is focused on the key role of the Mg/Si ratio, transition metals, Cu, Cr and Mn first of all, in the formation of balanced properties, since the positive effect of these elements on increasing the strength and the recrystallization temperature is often offset by the negative impact on intergranular corrosion and quench sensitivity. It is shown that in low-alloyed Al–Mg–Si alloys the strength premises Mg/Si≈1 and the premises for high-end corrosion resistance Mg/Si≈2 are occurred simultaneously. Alongside an increase of the absolute content of Mg and Si in alloys, alongside an increase of alloying degree with other strengthening elements, it is impossible to simultaneously fulfill both of these premises; therefore, one has to look for a reasonable compromise between strengthening, decreasing the technological plasticity and corrosion resistance of alloys. One of the effective ways to reach such a compromise is multi-stage regimes of artificial aging. The prospects of microalloying with Sc and Ca able to form with aluminum nanoscale intermetallic phases of hardening are outlined. Keywords: avials, semi - finished products, alloying system, transition metals, aging, mechanical properties, intergranular corrosion.

show abstract

Avials, history of creation and overview of future outlook

Sinchuk¹

2021

Metalozn. obrobka met.

View full text Add to dashboard Cite

show abstract

Reducing the sensitivity of high-silicon Al-Mg-Si(Cu) alloys to intergranular corrosion

Sinchuk¹,

Merkkulov²

2022

Metalozn. obrobka met.

View full text Add to dashboard Cite

The mechanical properties and susceptibility to intergranular corrosion (IGC) of Al-Mg-Si(Cu) aircraft alloys containing 1.4-1.5%Si were studied. A different Mg/Si ratio and a different phase content of Mg2Si and Si, as a consequence, were realized for them by varying the chemical composition. It is shown, that the strength of the alloys increases and the resistance to MGC decreases as the chemical composition of the alloy moves away from the quasi-binary cross-section and the amount of residual silicon Si+ above the limit required for Mg2Si formation is enhanced. Marked No. 2 the strongest alloy and the least corrosion-resistant, at the same time, which has UTS ≥350 MPa and MGC penetration depth of more than 100 μm was determined. It contains 0.7 % Si+ and, among the other experimental alloys, this one is the closest to the upper solubility limit of 1.85 % Mg2Si in aluminum. The negative effect of Cu and Fe on MGC, as well as the temporary delay, if any between quenching and strengthening heat treatment (artificial aging), was demonstrated. A series of isothermal curves, which characterize the strengthening of alloy No. 2 during artificial aging, was obtained, and it is shown, there is no isothermal processing within the temperature range of 145-200 °С, which would increase its resistance to MGC. Analyzing the generally accepted sequence of phase transformations, which takes place during the decomposition of a supersaturated solid solution after quenching, two-stage treatment modes of 145 °С, 4 h + 220 °С, 0.5 h and 145 °С, 2 h + 165 °С, 4 h were found and tested. They provided decreasing the maximum depth of MGC penetration by approximately 1.5-2.5 without significant worsening of the mechanical properties for alloy No. 2. Keywords: aircraft alloys, strength, intergranular corrosion, residual silicon, artificial aging, multi-stage processing.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

CRITERIA FOR THE SELECTION OF THE FIRST STAGE OF AGING IN ALLOY 6013 OF THE Al-Mg-Si-Cu SYSTEM

Cited by 2 publications

References 5 publications

Avials, history of creation and overview of future outlook

Avials, history of creation and overview of future outlook

Reducing the sensitivity of high-silicon Al-Mg-Si(Cu) alloys to intergranular corrosion

Contact Info

Product

Resources

About