Subscolidus Superplasticity of Aluminium Alloys

Novikov, I. I.; Portnoy, V.K.; Левченко, В. С.; Nikiforov, A. O.

doi:10.4028/www.scientific.net/msf.243-245.463

Cited by 20 publications

(9 citation statements)

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“…Similar conclusions are applicable to Al-CuMn or Al-Mg-Mn alloys, which showed extensive superplastic elongations by the slip of dislocations rather than grain boundary sliding. 16,17 …”

Section: Finely Grained Structure Superplasticitymentioning

confidence: 98%

Superplasticity in NiAl and NiAl-based alloys

Guo

Zhou

et al. 2002

J. Mater. Res.

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Superplastic deformation was realized on NiAl and NiAl-based alloys prepared by both common casting and directional solidification. Directionally solidified NiAl-27Fe-3Nb alloy as well as conventionally cast NiAl, NiAl-25Cr, NiAl-9Mo, NiAl-20Fe-Y.Ce, and NiAl-30Fe-Y alloys exhibited typical deformation characteristics shown in conventionally superplastic materials. NiAl and NiAl-based alloys could be divided into three categories depending on their different superplastic behavior: finely grained structure (NiAl-9Mo, NiAl-25Cr, NiAl-20.4Fe-Y.Ce, NiAl-30Fe-Y), coarsely grained structure (NiAl), and columnar structure (NiAl-27Fe-3Nb). The corresponding deformation mechanisms for fine-grained structure, coarsely grained structure, and columnar structure were grain boundary sliding or grain boundary sliding accompanied by dynamic recrystallization, dynamic recovery and recrystallization, and intragrain dislocation slip, respectively.

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“…Similar conclusions are applicable to Al-CuMn or Al-Mg-Mn alloys, which showed extensive superplastic elongations by the slip of dislocations rather than grain boundary sliding. 16,17 …”

Section: Finely Grained Structure Superplasticitymentioning

confidence: 98%

Superplasticity in NiAl and NiAl-based alloys

Guo

Zhou

et al. 2002

J. Mater. Res.

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“…Generally speaking, superplastic deformation is mainly controlled by three mechanisms: grain-boundary sliding (GBS), dislocation slip/creep, and diffusion creep or directional diffusional flow [53]. Meanwhile, superplastic deformation is accompanied by various processes, for instance, grainboundary migrations and static/dynamic grain growth, grain rotation [80,99], recovery, recrystallisation, and polygonisation [87,100,101]. It is commonly accepted that GBS at low strain rates and creep by glide plus climb, also named slip creep, at high strain rates are the dominant controlling mechanisms that operate during high-temperature deformation of fine-grained metallic materials [102][103][104].…”

Section: Mechanisms Of Superplastic Deformationmentioning

confidence: 99%

A Review on Superplastic Formation Behavior of Al Alloys

Wang

et al. 2018

Advances in Materials Science and Engineering

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Superplastic formation technology is considered to be an effective and promising method to conquer formation difficulties of Al alloys, especially thin-walled or complex structure. In this paper, fundamentals of superplastic deformation of Al alloys are summarized and the superplastic deformation behaviors of main kinds of Al alloys are summarized and compared, including Al-Mg alloys, Al-Li alloys, and Al-Zn-Mg alloys as well as aluminum matrix composites. Then, the superplastic deformation mechanism for different Al alloys is thoroughly discussed. Last but not the least, the factors affecting the superplastic deformation process are fully analyzed.

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“…The contribution from GBS was also measured on one sample using a two-step straining procedure described in [103]. Figure 11.10 shows the surface markers, as recorded by SEM, for a specimen tested to 200% plus an additional 20% at 400°C with an initial strain rate of 10 −2 s −1 .…”

Section: Superplasticity After Processing By Ecapmentioning

confidence: 99%