Effects of annealing temperature on the mechanical properties and sensitization of 5083-H116 aluminum alloy

Chen, Renyu; Chu, Hsiao-Yeh; Lai, Cheng-Chyuan; Wu, Chih-Ting

doi:10.1177/1464420713512249

Cited by 20 publications

(13 citation statements)

References 16 publications

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“…Different precipitate particles are formed by phase transformations during the sensitization process. In sensitized Al‐Mg alloys, rearrangement of dislocations and dislocation substructures due to the transformation from single phase α to equilibrium β‐phase are mainly responsible for the reorientation of the grain structure . Additionally, prolonged annealing or sensitization provides suitable temperature and time for the solute atoms to redistribute themselves through phase transformation near grain boundaries as well as filling of lattice vacancies throughout the grains; hence, reorientation of grain size is inevitable .…”

Section: Resultsmentioning

confidence: 99%

Investigation of fatigue and fracture behaviour of sensitized marine grade aluminium alloy AA 5754

Kumar

Singh

2019

Fatigue Fract Eng Mat Struct

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In the present study, fatigue and fracture characteristics of sensitized marine grade Al‐Mg (AA 5754) alloy are experimentally evaluated. Received alloy is sensitized at temperatures of 150°C (SENS50) and 175°C (SENS75) for 100 hours. Fracture parameters, KIc and JIc, are experimentally evaluated. Slow strain rate tensile tests at a crosshead speed of 0.004, 0.006, and 0.01 mm/min; fatigue crack growth tests at load ratios (R = Pmin/Pmax) of 0.1, 0.2, and 0.5; and low cycle fatigue tests at four strain amplitudes of (0.3‐0.6)% are performed for SENS50 and SENS75 alloys. Relatively lower magnitude of fracture toughness values are observed for SENS75 specimen. Severe degradation in tensile properties, fatigue crack growth characteristics, and low cycle fatigue lives are observed for SENS75 samples. Extended finite element method is adopted to simulate the elasto‐plastic crack growth during fracture toughness evaluation. Scanning electron microscopy (SEM) is used to understand the failure mechanism of sensitized alloys.

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Section: Resultsmentioning

confidence: 99%

Investigation of fatigue and fracture behaviour of sensitized marine grade aluminium alloy AA 5754

Kumar

Singh

2019

Fatigue Fract Eng Mat Struct

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“…Algunos autores han observado que, con los cambios de temperatura posteriores a los 300°C, los precipitados del tipo Al 6 (Mn, Fe) pueden modificar su morfología de romboidal a la de dispersoides tipo bastón, o descomponerse en la fase metaestable Al 12 Mn, insinuando este hecho que, tal vez, desde esta temperatura y posteriores esta fase ya no sea eficaz para frenar la migración de contornos de grano [14,[21][22][23]. Los ciclos térmicos tienen un importante efecto sobre las propiedades mecánicas y el comportamiento a la corrosión de esta aleación [20,[24][25].…”

Section: Discussionunclassified

Efectos de la aplicación de tratamientos isotérmicos sobre el tamaño de grano y la dureza de aleaciones de aluminio AA5083-H116

et al. 2017

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RESUMENEn este trabajo se estudia la relación entre las características morfológicas del grano y la dureza de la aleación de aluminio AA5083-H116 cuando se somete a la acción de tratamientos isotérmicos diversos no acumulativos. Para el análisis se usaron las técnicas de microscopia óptica y electrónica de barrido, microanálisis químico, medición de durezas, barridos de calorimetría diferencial, cálculos con termodinámica computacional y análisis de imágenes con el objetivo de estimar las temperaturas de inicio de la recristalización y de crecimiento de grano, así como las transformaciones de fase asociadas a estos ciclos térmicos. Se determinó que la temperatura de inicio de recristalización estática del material está entre 150° y 180°C, ocurriendo como un proceso heterogéneo, mientras que un posible crecimiento anormal del grano inicia aproximadamente a los 300°C. Estos resultados son importantes para entender lo que ocurre en la microestructura durante los procesos de fabricación en los cuales se presenten ciclos térmicos similares, como en soldadura por fusión y tratamientos térmicos aplicados sobre este tipo de material y su relación con los cambios en propiedades locales. Palabras-clave: Aleación de aluminio, recristalización, ciclos térmicos, tamaño de grano, DSC ABSTRACTIn this work is studied the relationship between morphological characteristics of grain and hardness of aluminum alloys AA5083-H116, which has been submitted to several isothermal treatments. For analysis development were used optical and scanning electron microscopy, chemical microanalysis, hardness measurements, differential scanning calorimetry (DSC) curves, computational thermodynamics calculations, and image digital analysis, aiming to determine the recrystallization and abnormal grain growth temperatures, as well as phase transformations associated to thermal cycles. It was determined that static recrystallization start temperature is between 150° to 180°C, which was observed as heterogeneous process at whole rolled structure of material, while a possible abnormal grain growth process is initiated at 300°C, approximately. The results of this work are important because helping to understand the microstructure evolution due to processes of fabrication, which have similar thermal cycles, such as welding and heat treatments applied on this kind of material.

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“…In figure 3a and Table 4, it is clear that AA 5083 marine aluminium alloy will resist uniform corrosion better than AA 5086 due to the percentage of Mg in AA 5083 (3.8 %) which is higher than Mg value in AA 5086 (3.11 %). The corrosion rate of AA 5083 alloy will decrease as a result of recrystallization annealing as shown in figure 3b and Table 5, due to annealing in the range of 230-350 0 C which will improve AA 5083 sensitization [28]. In AA 5086 the corrosion rate will increase due to (Al3 Mg2) precipitate along the grain boundary of AA 5086 during the fabrication of the plate [29] which will result in intergranular corrosion, and the disappearance of Ti from the microstructure of AA 5086.…”

Section: Effect Of Recrystallization Annealing On Corrosion Behaviourmentioning

confidence: 99%

Studying Corrosion Behavior of Recrystallization Treatment of AA 5083 and AA 5085 Aluminium Alloys in Tigris and Shatt Al Arab

Mahdi¹,

Mohammed²

2020

Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart

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In this study, the corrosion behaviour of both AA 5083 and AA 5086 aluminium alloys in the marine environment was investigated in the Tigris and Shatt Al Arab water media before and after recrystallization annealing at room temperature (23 0 C). The corrosion resistance of AA 5083 marine aluminium alloy shows an improvement after recrystallization at a temperature of 350 0 C for 15 minutes from (708.5 × 10-6) to (513 × 10-6 mmpy) in Tigris, while in Shat Al Arab the improvement was from (1.84 × 10-5) to (217.7 × 10-6 mmpy) using the Tafel test. While the corrosion resistance in AA5086 decreased in both Shat Al Arab and Tigris River, in Tigris the decreasing was from (1.259 × 10-3) to (7.418 × 10-3 mmpy), while in Shat Al Arab the decreasing was from (28.25 × 10-6) to (305 × 10-6 mmpy). Both alloys suffered from uniform corrosion in the Tigris River. In Shat Al Arab both alloys suffered from pitting corrosion. Hardness for both alloys shows decreasing after recrystallization annealing.

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Effects of annealing temperature on the mechanical properties and sensitization of 5083-H116 aluminum alloy

Cited by 20 publications

References 16 publications

Investigation of fatigue and fracture behaviour of sensitized marine grade aluminium alloy AA 5754

Investigation of fatigue and fracture behaviour of sensitized marine grade aluminium alloy AA 5754

Efectos de la aplicación de tratamientos isotérmicos sobre el tamaño de grano y la dureza de aleaciones de aluminio AA5083-H116

Studying Corrosion Behavior of Recrystallization Treatment of AA 5083 and AA 5085 Aluminium Alloys in Tigris and Shatt Al Arab

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