PDF

Distinct microstructural contributions to intergranu 2026 Journal of Alloys

Jingyun Fu, Guofu Xu

2026enaluminum lithium alloycorrosionaging treatmentmicrostructureintergranular corrosionstress corrosion cracking

Abstract

Language:

Aging-induced precipitation strongly affects the corrosion behavior of Al – Li alloys, yet intergranular corrosion (IGC) and stress corrosion cracking (SCC) may respond differently to changes in precipitation and grain-boundary microstructure. In this work, the precipitation behavior, grain-boundary microchemistry, electrochemical response, corrosion-induced hydrogen absorption, IGC susceptibility, and SCC behavior of 2050 Al – Li alloy subjected to T6, T8, and double aging treatments were systematically investigated. T8 aging promoted the formation of fine and densely distributed intragranular T1 precipitates through deformation-assisted nucleation, whereas double aging produced coarser intragranular T1 precipitates and more discontinuous grain-boundary precipitation. The maximum IGC depth decreased from 190.08 μm under T6 aging to 113.12 μm under double aging, indicating a marked improvement in IGC resistance. In contrast, the SCC susceptibility index increased from 10.11% under T6 aging to 19.15% under double aging, while the T8 alloy showed intermediate behavior. The results suggest that IGC propagation is mainly associated with the continuity of the electrochemically active grain-boundary path formed by grain-boundary precipitates and adjacent solute redistribution. By comparison, SCC is influenced by the combined effects of interfacial electrochemical behavior, stress-assisted localized dissolution, and hydrogen-related processes. Consequently, the IGC and SCC resistance rankings show opposite trends under the investigated aging conditions.

Download

Cite This Work

@article{5c877b30-5667-4f36-bb57-72374ebca667,
  title={Distinct microstructural contributions to intergranu 2026 Journal of Alloys },
  author={Jingyun Fu and Guofu Xu},
  year={2026},
  language={en}
}
TY  - JOUR
TI  - Distinct microstructural contributions to intergranu 2026 Journal of Alloys 
AU  - Jingyun Fu
AU  - Guofu Xu
PY  - 2026
LA  - en
ER  -

Similar Items

Influence of microstructure on stress corrosion cra 2026 Journal of Material

Xinya Yang, Leixin Qin

This study demonstrates that engineering microstructure is a decisive lever for stress corrosion cracking (SCC) resistance in a Ti-Al-V-Mo-Zr alloy ex

2026enPDF

Surface engineering by non-equilibrium plasma remelting processing for supreme stress corrosion cracking protection

Shiqi Ma, Toushiqul Islam

The degradation of stainless steels (SS) in corrosive environments severely limits their long-term service reliability. While numerous bulk and surfac

2026enPDF

Synergistically enhanced alkali activated recycled mortar with 2026 Results

Hui Zhou, Huanan Liu

To address the issue of insufficient strength in alkali-activated recycled concrete powder (RCP) mortar at high replacement rates, this study proposes

2026enPDF

Temperature-dependent intergranular oxidation and its contribution to stress corrosion cracking of cold-rolled AISI 316L stainless steel in simulated PWR primary water

Fujie Zhou, Xiujie Wang

The effects of temperature (200~325 °C) on the stress corrosion cracking (SCC) crack growth rate (CGR) of 16% one-directionally cold-rolled (1DCR16) A

2026enPDF

Tailoring the grain boundary precipitates and precipitate-free zone to mitigate corrosion and stress corrosion cracking in Al-Zn-Mg-Cu alloy

Yajie Yang, Ya Wu

The static corrosion and stress corrosion cracking (SCC) behaviors of peak-aged Al-Zn-Mg-Cu alloys were systematically investigated as a function of Z

2026enPDF

Real-time tomography of stress corrosion cracking on stainless steel by an in-situ corrosion tensile test

Kuo Yuan, Sharif Ahmed

This study investigates the real-time tomography of stress corrosion cracking on stainless steel using an in-situ corrosion tensile test. The objectiv

2026enPDF