Room-temperature low-cycle fatigue and fracture behaviour of asymmetrically rolled high-strength 7050 aluminium alloy plates

Hou, Longgang; Xiao, Wei; Su, Hang; Wu, Chensheng; Eskin, Dmitry; Katgerman, L.; Zhuang, Lin; Zhang, J.S.

doi:10.1016/j.ijfatigue.2020.105919

Cited by 22 publications

(22 citation statements)

References 88 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the subsequent heat treatment process, some or all deformation works were released, giving rise to the driving force for recrystallization of the alloy's internal structure. This, in turn, caused partial or total recrystallization, finally leading to incomplete recrystallization of the alloy [44]. Hence, recrystallization seriously influenced the fracture toughness of aluminum alloys.…”

Section: High Cycle Fatigue Performance Of 211zx Alloymentioning

confidence: 99%

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Zhong

Huang

Chen

et al. 2022

Metals

View full text Add to dashboard Cite

In the present paper, the high cycle fatigue (HCF) of a novel 211Z.X aluminum alloy with high strength was studied under hot-rolling and as-cast states at room temperature. The effects of microstructure and distribution of precipitated phases and impurities on the mechanical properties, HCF performances, fatigue microcrack initiation, and propagation behavior of the 211Z.X alloy were studied by transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The HCF S–N curves, P–S–N curves and Goodman fatigue diagrams of 211Z.X alloy consisting of two microstructures were drawn. The results suggested that the fine and dispersive distribution of the second phases improved the strength of the alloy. The formation of short-bar and spherical precipitates promoted coordinated deformation of the alloy. This promoted higher microcrack initiation resistance of 211Z.X alloy with a hot rolling state than in the cast state. As a result, the HCF properties of the hot-rolling alloy were better than those of the cast alloy. In sum, these results look promising for future reliable design of engineering structures and application of new aluminum alloys.

show abstract

Section: High Cycle Fatigue Performance Of 211zx Alloymentioning

confidence: 99%

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Zhong

Huang

Chen

et al. 2022

Metals

View full text Add to dashboard Cite

show abstract

“…Generally, an improvement in material plasticity improves its low‐cycle fatigue performance. [ 14 ] The increased plasticity of the T6 specimen after heat treatment results in an increase in its low‐cycle fatigue life. The observed increase in the stress amplitude is related to the increase in the UTS after heat treatment.…”

Section: Resultsmentioning

confidence: 99%

“…[ 12,13 ] Generally, the low‐cycle fatigue performance of a material is closely related to its plasticity, deteriorating because of a reduction in plasticity. [ 14 ] In general, alloying technology increases the strength and plasticity of a material, but the high cost of this method and the resultant increase in density limit its application. SSPD technology can significantly improve the strength of the material, but the inherent reduction in plasticity negatively affects the low‐cycle fatigue behavior, and the inability to process complex workpieces limits the application of SSPD technology.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Low‐Cycle Fatigue Performance of LZ91 Mg–Li Alloy

Liu

et al. 2021

Adv Eng Mater

View full text Add to dashboard Cite

Herein, the effects of heat treatment on the microstructure, tensile properties, and low‐cycle fatigue properties of the LZ91 Mg–Li alloy are investigated. The results indicate that after heat treatment, the α‐phase undergoes spheroidization, and a portion of the needle‐like α‐phase is distributed at the β‐phase grain boundary; in addition, the ultimate tensile strength (UTS) and elongation of the material increase by 9.6% and 20%, respectively, and the low‐cycle fatigue life is improved. The increase in the UTS of the specimen is attributed to the precipitation of the needle‐like α‐phase, whereas that in material plasticity is attributed to α‐phase spheroidization after heat treatment. It is observed that fatigue cracks all originate on the surface of the specimens, predominantly in the β‐phase. The needle‐like α‐phase suppresses the initiation of macro fatigue cracks, and the increased α‐phase microhardness decelerates the crack growth rate, thereby improving the low‐cycle fatigue life of the alloy.

show abstract

“…Brittle primary phases, e.g., Fe- or Si-containing particles, have a detrimental impact on almost all mechanical properties. Such particles easily fracture under (plastic) deformation of the Al-matrix (e.g., [ 36 ]), and, therefore, act as fatigue crack initiation sites [ 37 ] or as stress concentrations ahead of a propagating fatigue crack [ 33 , 36 , 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

Damage Mechanisms and Anisotropy of an AA7010-T7452 Open-Die Forged Alloy: Fatigue Crack Propagation

et al. 2022

View full text Add to dashboard Cite

The process–microstructure–property relationship of high-strength 7000 series aluminum alloys during fatigue crack propagation (FCP) is highly relevant for safety during the design and service of aircraft structural components. It is scientifically evident that many metallurgical factors affect FCP properties, but partly contradictory or inconclusive results show that the quantitative description of the relationships is still a major challenge among researchers and engineers. Most research focuses on sheet or plate products and investigations lack quantitative information on the process–property relationship between open-die forged thick products and FCP. The present study contributes to this field by investigating the fatigue crack growth behavior of an open-die forged AA7010-T7452 aluminum alloy. Four different forging conditions comprising different characteristic microstructures are comparatively analyzed. The influence of grain size, grain shape, specimen orientation, crystallographic texture, and primary phase particles is investigated. Fractographic analysis reveals different active damage mechanisms during fatigue crack growth. Based on that, the microstructure features relevant to fatigue damage areidentified in each regime of crack growth.

show abstract

Room-temperature low-cycle fatigue and fracture behaviour of asymmetrically rolled high-strength 7050 aluminium alloy plates

Cited by 22 publications

References 88 publications

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Effect of Microstructure on High Cycle Fatigue Behavior of 211Z.X-T6 Aluminum Alloy

Effect of Heat Treatment on Low‐Cycle Fatigue Performance of LZ91 Mg–Li Alloy

Damage Mechanisms and Anisotropy of an AA7010-T7452 Open-Die Forged Alloy: Fatigue Crack Propagation

Contact Info

Product

Resources

About