Effects of grain size and dislocation density on strain hardening behavior of ultrafine grained AA1050 processed by accumulative roll bonding

Gashti, Seyed Omid; Fattah‐alhosseini, Arash; Mazaheri, Yousef; Keshavarz, Mohsen

doi:10.1016/j.jallcom.2015.11.032

Cited by 100 publications

(37 citation statements)

References 62 publications

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“…6, the amount of low-angle grain boundaries marked by white lines, increased with increasing Zn concentration, which also indicated the occurrence of stage IV. To some extent, the formation of a subboundary alleviates the softening effect due to dynamic recovery [37,38] . Hence, the decline pace of strain hardening rate slows down obviously in Mg-3Zn and Mg-4Zn.…”

Section: Rate Of Dislocation Storage In the As-extruded Mg-zn Alloysmentioning

confidence: 99%

Strain hardening of as-extruded Mg-xZn (x = 1, 2, 3 and 4 wt%) alloys

Zhao

Chen

Pan

et al. 2019

Journal of Materials Science & Technology

112

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The influence of Zn on the strain hardening of as-extruded Mg-xZn (x = 1, 2, 3 and 4 wt%) magnesium alloys was investigated using uniaxial tensile tests at 10-3 s-1 at room temperature. The strain hardening rate, the strain hardening exponent and the hardening capacity were obtained from true plastic stress-strain curves. There were almost no second phases in the as-extruded Mg-Zn magnesium alloys. Average grain sizes of the four as-extruded alloys were about 17.8 μm. With increasing Zn content from 1 2 to 4 wt%, the strain hardening rate increased from 2850 MPa to 6810 MPa at (σ-σ0.2) = 60 MPa, the strain hardening exponent n increased from 0.160 to 0.203, and the hardening capacity, Hc increased from 1.17 to 2.34. The difference in strain hardening response of these Mg-Zn alloys might be mainly caused by weaker basal texture and more solute atoms in the α-Mg matrix with higher Zn content.

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Section: Rate Of Dislocation Storage In the As-extruded Mg-zn Alloysmentioning

confidence: 99%

Strain hardening of as-extruded Mg-xZn (x = 1, 2, 3 and 4 wt%) alloys

Zhao

Chen

Pan

et al. 2019

Journal of Materials Science & Technology

112

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“…5c. The strain hardening increased as the dislocation density increased [22], according to Ref. [23].…”

Section: Mechanistic Discussionmentioning

confidence: 66%

Recycle-Friendly Aluminum Alloy Sheets for Automotive Applications Based on Hemming

Zhang

Tian

et al. 2018

Automot. Innov.

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Unavoidably, Fe impurities are mixed into Al alloys during recycling of aluminum automotive parts. High Fe content recyclefriendly aluminum alloy sheets (RASs) are discussed in terms of their applications to car body parts and closures. RASs have advantages, such as they are low cost and light weight, they require less energy to process, and they reduce emissions when used in vehicles. The hemming ability of RASs was investigated through various quenching rates and hot-rolling reduction rates. The hemming factor (HF) values of low Fe content samples (0.1 and 0.3 wt% Fe content) were 2 and 3. The hemming ability of samples with an Fe content of 0.5 wt% was unacceptable for applications to automotive outer closures (i.e., HF values of 4 and 5). The HF values changed from 3 to 5 for even higher Fe content samples (0.8 wt% Fe), depending on the quenching and hot-rolling reduction rates. Lower quenching (air quenching) and lower hot-rolling reduction rates (6-pass hot rolling) both improved the hemming ability of the high Fe content samples. A low-cost and recycle-friendly aluminum alloy automotive sheet from end-of-life vehicles is presented, and its hemming properties are characterized.Keywords Recycle-friendly · Lightweight · Hemming · Aluminum alloy · Automotive sheets · End-of-life vehicle Abbreviations

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“…[3][4][5][6] Great efforts have been made to overcome this drawback. [15] In the method of roll bonding, the interfaces between sheets are metallurgical bonding. [3,7] The methods mainly include explosive welding, [6,8] roll bonding, [7,[9][10][11] diffusion bonding, [12,13] friction stir welding, [14] and so on.…”

Section: Introductionmentioning

confidence: 99%

“…Among these methods, roll bonding is the most widely used technology because it is the easiest method to put into production. [15] In the method of roll bonding, the interfaces between sheets are metallurgical bonding. [16,17] In the previous literatures, many laminated composites are produced by roll bonding, including Al/Ti/Al, [18] Ti/Cu, [19] Al/Steel, [20] Al/Mg-Li, [4] and so on.…”

Section: Introductionmentioning

confidence: 99%

Influence of Annealing Temperature on the Microstructure and Mechanical Properties of Al/Mg/Al Composite Sheets Fabricated by Roll Bonding

Zheng

Jinliang

et al. 2016

Adv Eng Mater

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Al1070/Mg-3Al-1Zn (AZ31)/Al1070 laminated sheets are prepared by roll bonding method. The microstructure and mechanical properties after rolling and annealing are investigated. The layer of Al 3 Mg 2 forms at the interface after annealing at 250 C, and the thickness increases with the increase of annealing temperature. It weakens the bonding strength of the laminated sheets. In addition, during tensile testing, the delamination happens, except for the specimen annealed at 200 C. With the increase of annealing temperature, the dimension of the delamination part increase gradually. The laminated sheets annealed at 250 C possess the best comprehensive properties.

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Effects of grain size and dislocation density on strain hardening behavior of ultrafine grained AA1050 processed by accumulative roll bonding

Cited by 100 publications

References 62 publications

Strain hardening of as-extruded Mg-xZn (x = 1, 2, 3 and 4 wt%) alloys

Strain hardening of as-extruded Mg-xZn (x = 1, 2, 3 and 4 wt%) alloys

Recycle-Friendly Aluminum Alloy Sheets for Automotive Applications Based on Hemming

Influence of Annealing Temperature on the Microstructure and Mechanical Properties of Al/Mg/Al Composite Sheets Fabricated by Roll Bonding

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