Intergranular corrosion
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Intergranular Cracking as a Major Cause of Long-Term Capacity Fading of Layered Cathodes Open
Capacity fading has limited commercial layered Li-ion battery electrodes to 0.8Co0.15Al0.05O2 (NCA) electrode change after capacity fade following months of slow charge-discharge. The changes in the reactions that underpin energy storage a…
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Oxygen Release Induced Chemomechanical Breakdown of Layered Cathode Materials Open
Chemical and mechanical properties interplay on the nanometric scale and collectively govern the functionalities of battery materials. Understanding the relationship between the two can inform the design of battery materials with optimal c…
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Manipulating the interfacial structure of nanomaterials to achieve a unique combination of strength and ductility Open
The control of interfaces in engineered nanostructured materials has met limited success compared with that which has evolved in natural materials, where hierarchical structures with distinct interfacial states are often found. Such interf…
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Laser powder bed fusion of AA7075 alloy: Influence of process parameters on porosity and hot cracking Open
Laser powder bed fusion (LPBF) is an attractive technology of manufacturing high-strength aluminium alloy parts for the aircraft and automobile industries, limited by poor processability of these alloys. This work was aimed at finding the …
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Study of the Microstructure and Cracking Mechanisms of Hastelloy X Produced by Laser Powder Bed Fusion Open
Hastelloy X (HX) is a Ni-based superalloy which suffers from high crack susceptibility during the laser powder bed fusion (LPBF) process. In this work, the microstructure of as-built HX samples was rigorously investigated to understand the…
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Segregation of Mg, Cu and their effects on the strength of Al Σ5 (210)[001] symmetrical tilt grain boundary Open
Alien elemental segregation can pronouncedly change the grain boundary properties. Systematic first-principles calculations were performed to investigate the Mg and Cu segregation behavior at Σ5 (210)[001] symmetrical tilt grain boundary (…
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Preparation and anisotropic properties of textured structural ceramics: A review Open
Ceramics are usually composed of randomly oriented grains and intergranular phases, so their properties are the statistical average along each direction and show isotropy corresponding to the uniform microstructures. Some methods have been…
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Atomic-scale compositional mapping reveals Mg-rich amorphous calcium phosphate in human dental enamel Open
Atomic-scale study of human dental enamel reveals an intergranular amorphous phase thought to be responsible for tooth decay.
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The influence of grain structure on the corrosion behaviour of 2A97-T3 Al-Cu-Li alloy Open
In the present study, the corrosion behaviour of 2A97-T3 Al-Cu-Li alloy is investigated. The corrosion propagation path is characterized with electron backscatter diffraction (EBSD) and transmission Kikuchi diffraction (TKD), and correlate…
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Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review Open
The effects of input heat of different welding processes on the microstructure, corrosion, and mechanical characteristics of welded duplex stainless steel (DSS) are reviewed. Austenitic stainless steel (ASS) is welded using low-heat inputs…
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Mesoscale Chemomechanical Interplay of the LiNi<sub>0.8</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>O<sub>2</sub> Cathode in Solid-State Polymer Batteries Open
Complex chemomechanical interplay exists over a wide range of length scales within the hierarchically structured lithium-ion battery. At the mesoscale, the interdependent structural complexity and chemical heterogeneity collectively govern…
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Localized corrosion in AA2024-T351 aluminium alloy: Transition from intergranular corrosion to crystallographic pitting Open
The relationship between intergranular corrosion and crystallographic pitting in AA2024-T351 aluminium alloy during immersion in 3.5 wt. % NaCl solution is investigated. It is found that intergranular corrosion occurs first and crystallogr…
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Corrosion fatigue lifetime assessment of high-speed railway axle EA4T steel with artificial scratch Open
The effects of environment (in air and 3.5 wt% NaCl solution) and artificially-induced surface scratches are investigated on the fatigue properties of railway EA4T (also called 25CrMo4) alloy steel. This steel is found to be markedly sensi…
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From Austenitic Stainless Steel to Expanded Austenite-S Phase: Formation, Characteristics and Properties of an Elusive Metastable Phase Open
Austenitic stainless steels are employed in many industrial fields, due to their excellent corrosion resistance, easy formability and weldability. However, their low hardness, poor tribological properties and the possibility of localized c…
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The effect of residual stress on the Preferential Intergranular Oxidation of Alloy 600 Open
Alloy 600 was exposed to H2-steam to simulate the oxidation that occurs in high temperature water where this alloy is known to be susceptible to SCC. Analytical electron microscopy was employed to characterize the early stages of oxidation…
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Research progress on the corrosion behavior of titanium alloys Open
Titanium and its alloys show outstanding application prospects in many industrial fields due to their high specific strength, good corrosion resistance, high temperature resistance, etc. However, at present the corrosion failure of Ti allo…
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Surface Characterization and Corrosion Behavior of 90/10 Copper-Nickel Alloy in Marine Environment Open
Surface characterization and corrosion behavior of 90/10 copper-nickel alloy in seawater from Xiamen bay at 30 °C for 56 days were investigated in this study. The results indicated that the corrosion product layer was mainly a mixture of C…
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Effect of grain refinement induced by wire and arc additive manufacture (WAAM) on the corrosion behaviors of AZ31 magnesium alloy in NaCl solution Open
Additive manufacturing (AM) of Mg alloys has become a promising strategy for producing complex structures, but the corrosion performance of AM Mg components remains unexploited. In this study, wire and arc additive manufacturing (WAAM) was…
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Mechanical Behavior of Inconel 625 at Elevated Temperatures Open
Inconel 625 is a nickel-based alloy that is mainly used in high-temperature applications. Inconel 625 exhibits an unstable plastic flow at elevated temperatures characterized by serrated yielding, well-known as the Portevin-Le Chatelier ef…
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Improve sensitization and corrosion resistance of an Al-Mg alloy by optimization of grain boundaries Open
The sensitization and subsequent intergranular corrosion of Al-5.3 wt.% Mg alloy has been shown to be an important factor in stress corrosion cracking of Al-Mg alloys. Understanding sensitization requires the review of grain boundary chara…
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Fully dense and crack free molybdenum manufactured by Selective Laser Melting through alloying with carbon Open
Pure molybdenum processed by Selective Laser Melting (SLM) shows a coarse–grained, columnar microstructure interspersed with cracks. The aim of this study was to process molybdenum by SLM with mechanical properties of powder metallurgicall…
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Review of micro-scale and atomic-scale corrosion mechanisms of second phases in aluminum alloys Open
Localized corrosion of aluminum (Al) alloys, such as pitting corrosion, intergranular corrosion, and stress corrosion cracking is closely related to the micro-galvanic corrosion between the second phase and the Al matrix. Using high-resolu…
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Corrosion behaviour of AA6082 Al-Mg-Si alloy extrusion: The influence of quench cooling rate Open
The influence of quench cooling rate on corrosion behaviour of AA6082-T6 Al-Mg-Si alloy extrusion is investigated. It is revealed that different quench cooling rates result in significant difference in grain boundary precipitation and inte…
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Grain Boundary Serration in Nickel-Based Superalloy Inconel 600: Generation and Effects on Mechanical Behavior Open
Grain boundary serration in the superalloy Inconel 600 was studied. Two microstructural variants, one with nonserrated and the other with serrated grain boundaries were generated by altering the heat-treatment conditions, while keeping oth…
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Effect of machining on stress corrosion crack initiation in warm-forged type 304L stainless steel in high temperature water Open
Warm-forged Type 304L stainless steel specimens have been tested in high temperature hydrogenated water under slow strain rate tensile test conditions to investigate the effect of machining on stress corrosion crack initiation. Roughness, …
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Microphysically Derived Expressions for Rate‐and‐State Friction Parameters, <i>a</i>, <i>b</i>, and <i>D</i><sub><i>c</i></sub> Open
Rate‐and‐state friction (RSF) laws are extensively applied in fault mechanics but have a largely empirical basis reflecting only limited understanding of the underlying physical mechanisms. We recently proposed a microphysical model descri…
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High temperature mechanical behavior of low-pressure sand-cast Mg–Gd–Y–Zr magnesium alloy Open
The aim of this work is firstly to optimize T6 heat-treatment of low-pressure sand-cast Mg–10Gd–3Y–0.5Zr alloy, and then systematically investigate the mechanical behavior of the T6-treated alloy from room temperature to 300 °C. It turned …
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Effects of Different Parameters on Initiation and Propagation of Stress Corrosion Cracks in Pipeline Steels: A Review Open
The demand for pipeline steels has increased in the last several decades since they were able to provide an immune and economical way to carry oil and natural gas over long distances. There are two important damage modes in pipeline steels…
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Effects of heat treatment on the microstructure and mechanical properties of extruded 2196 Al-Cu-Li alloy Open
In this study, the effects of heat treatment on the microstructure and mechanical properties of extruded 2196 Al-Cu-Li alloy were examined and the precipitation behavior and strengthening mechanism were investigated. It was found that the …
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Mechanical and Microstructural Characterization of TIG Welded Dissimilar Joints between 304L Austenitic Stainless Steel and Incoloy 800HT Nickel Alloy Open
In this article, the mechanical properties and microstructure of 304L austenitic stainless steel/Incoloy 800HT nickel alloy dissimilar welded joints are investigated. The joints were made of 21.3 mm × 7.47 mm tubes using the TIG process wi…