Effect of deformation induced precipitation on grain refinement and improvement of mechanical properties AA 7055 aluminum alloy

Zuo, Jinrong; Hou, Longgang; Shi, Jun; Cui, Hua; Zhuang, Linzhong; Zhang, Jishan

doi:10.1016/j.matchar.2017.05.038

Cited by 66 publications

(18 citation statements)

References 26 publications

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“…Cold deformation of supersaturated solid solution reduces its thermodynamic stability and accelerates ageing effects. However, the influence of strain hardening on the ageing process is complicated, because it depends on conditions of supersaturation, deformation degree and ageing temperature, alloy type, and the type of precipitations occurring during ageing [ 14 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Another modification of technological process of the 7075 alloy, which consisted of double thermomechanical processing leading to refinement of the microstructure, was proposed by El-Baradie et al [ 13 ]. Zuo et al [ 15 , 16 , 17 ] used two-stage hot rolling during thermomechanical treatment of the 7055 alloy for realization of the same purpose. In turn, Huo et al [ 18 , 19 ] carried out continuous rolling during cooling from a hot rolling temperature for the 7075 alloy.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

et al. 2018

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The paper presents results of the investigations on the effect of low-temperature thermomechanical treatment (LTTT) on the microstructure of AlZn6Mg0.8Zr alloy (7000 series) and its mechanical properties as well as electrochemical and stress corrosion resistance. For comparison of the LTTT effect, the alloy was subjected to conventional precipitation hardening. Comparative studies were conducted in the fields of metallographic examinations and static tensile tests. It was found that mechanical properties after the LTTT were better in comparison to after conventional heat treatment (CHT). The tested alloy after low-temperature thermomechanical treatment with increasing plastic deformation shows decreased electrochemical corrosion resistance during potentiodynamic tests. The alloy after low-temperature thermomechanical treatment with deformation degree in the range of 10 to 30% is characterized by a high resistance to stress corrosion specified by the level of PSCC indices.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

et al. 2018

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“…Other studies [21,[35][36][37][38] describe the recrystallisation mechanism of aluminum alloys, confirming the fact that it is crucial to tailor the mechanical properties controlling the grain size and morphology.…”

Section: Samplementioning

confidence: 66%

AA7050 Al Alloy Hot-Forging Process for Improved Fracture Toughness Properties

Angella

Schino

Donnini

et al. 2019

Metals

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The conventional heat-treatment standard for the industrial post hot-forging cycle of AA7050 is regulated by the AMS4333 and AMS2770N standards. An innovative method that aimed to improve toughness behavior in Al alloys has been developed and reported. The unconventional method introduces an intermediate warm working step between the solution treating and the final ageing treatment for the high resistance aluminum alloy AA7050. The results showed several benefits starting from the grain refinement to a more stable fracture toughness KIC behavior (with an appreciable higher value) without tensile property loss. A microstructural and precipitation state characterization provided elements for the initial understanding of these improvements in the macro-properties.

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“…Also, increase of Cu from 0 to 1.6 % causes an enhancement of tensile strength by 59 Mpa, from 515 Mpa to 574 Mpa. Jinrong Ju et al, 19 in a paper reporting the findings of their research on the effect of double step hot rolling (DR) on the mechanical properties of 7055 aluminum alloy, revealed that, DR caused alloy possess high toughness. DR by generating fine MgZn 2 particles which pin grain boundaries, prevent grains from getting coarse.…”

Section: Literature and Discussionmentioning

confidence: 99%

7xxx aluminum alloys; strengthening mechanisms and heat treatment: a review

Ashjari¹,

Feizi²

2018

MSEIJ

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The intention of authoring this paper was giving the report of reviewing task of the previous researches done on the strengthening mechanisms and heat treatment of 7xxx aluminum alloys. The overall conclusion is that, the most powerful and so the most common strengthening mechanism in 7xxx alloys is the precipitation hardening (T6 heat treatment). On the other hand, stress corrosion is a problem in T6 treated 7xxx alloys, to address which, researchers have turned to special heat treatment called RRA (retrogression and re-aging) which picks the strength from T6, and stress corrosion resistance from T7x heat treatments.

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Effect of deformation induced precipitation on grain refinement and improvement of mechanical properties AA 7055 aluminum alloy

Cited by 66 publications

References 26 publications

Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

AA7050 Al Alloy Hot-Forging Process for Improved Fracture Toughness Properties

7xxx aluminum alloys; strengthening mechanisms and heat treatment: a review

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