Age hardening and the potential for superplasticity in a fine-grained Al-Mg-Li-Zr alloys

Furukawa, Minoru; Berbon, P B; Langdon, T G; Horita, Zenji; Nemoto, Minoru; Tsenev, N K; Valiev, R Z

doi:10.1007/s11661-998-0170-6

Title: Age hardening and the potential for superplasticity in a fine-grained Al-Mg-Li-Zr alloys

Full Record
Other Related Research

Abstract

Experiments were conducted to determine the age-hardening characteristics and the mechanical properties of an Al-5.5 pct Mg-2.2 pct Li-0.12 pct Zr alloy processed by equal-channel angular (ECA) pressing to give a very fine grain size of {approximately} 1.2 {micro}m. The results show that peak aging occurs more rapidly when the grain size is very fine, and this effect is interpreted in terms of the higher volume of precipitate-free zones in the fine-grained material. Mechanical testing demonstrates that the ECA-pressed material exhibits high strength and good ductility at room temperature compared to conventional Al alloys containing Li. Elongations of up to {approximately} 550 pct may be achieved at an elevated temperature of 603 K in the ECA-pressed condition, thereby confirming that, in this condition, the alloy may be a suitable candidate material for use in superplastic forming operations.

Authors:

Furukawa, Minoru ^[1]; Berbon, P B; Langdon, T G ^[2]; Horita, Zenji; Nemoto, Minoru ^[3]; Tsenev, N K ^[4]; Valiev, R Z ^[5]

Fukuoka Univ. of Education (Japan). Dept. of Technology
Univ. of Southern California, Los Angeles, CA (United States)
Kyushu Univ., Fukuoka (Japan)
Ufa State Petroleum Technical Univ. (Russian Federation). Inst. of Chemical Technology
Ufa State Aviation Technical Univ. (Russian Federation). Inst. of Physics of Advanced Materials

Publication Date:: Thu Jan 01 00:00:00 EST 1998

Sponsoring Org.:: Ministry of Education, Science and Culture (Japan); National Science Foundation, Washington, DC (United States); Department of the Army, Washington, DC (United States)

OSTI Identifier:: 605821

Resource Type:: Journal Article

Journal Name:: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

Additional Journal Information:: Journal Volume: 29; Journal Issue: 1; Other Information: PBD: Jan 1998

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ALUMINIUM BASE ALLOYS; AGE HARDENING; MECHANICAL PROPERTIES; MATERIALS WORKING; MAGNESIUM ALLOYS; LITHIUM ALLOYS; ZIRCONIUM ADDITIONS; MICROSTRUCTURE

Citation Formats


                    Furukawa, Minoru, Berbon, P B, Langdon, T G, Horita, Zenji, Nemoto, Minoru, Tsenev, N K, and Valiev, R Z. Age hardening and the potential for superplasticity in a fine-grained Al-Mg-Li-Zr alloys.  United States: N. p., 1998. 
        Web.  doi:10.1007/s11661-998-0170-6.

Copy to clipboard


                    Furukawa, Minoru, Berbon, P B, Langdon, T G, Horita, Zenji, Nemoto, Minoru, Tsenev, N K, & Valiev, R Z. Age hardening and the potential for superplasticity in a fine-grained Al-Mg-Li-Zr alloys.  United States.  https://doi.org/10.1007/s11661-998-0170-6

Copy to clipboard


                    Furukawa, Minoru, Berbon, P B, Langdon, T G, Horita, Zenji, Nemoto, Minoru, Tsenev, N K, and Valiev, R Z. 1998.  
        "Age hardening and the potential for superplasticity in a fine-grained Al-Mg-Li-Zr alloys".  United States.  https://doi.org/10.1007/s11661-998-0170-6.

Copy to clipboard


                    
@article{osti_605821,

  title        = {Age hardening and the potential for superplasticity in a fine-grained Al-Mg-Li-Zr alloys},

  author       = {Furukawa, Minoru and Berbon, P B and Langdon, T G and Horita, Zenji and Nemoto, Minoru and Tsenev, N K and Valiev, R Z},

  abstractNote = {Experiments were conducted to determine the age-hardening characteristics and the mechanical properties of an Al-5.5 pct Mg-2.2 pct Li-0.12 pct Zr alloy processed by equal-channel angular (ECA) pressing to give a very fine grain size of {approximately} 1.2 {micro}m. The results show that peak aging occurs more rapidly when the grain size is very fine, and this effect is interpreted in terms of the higher volume of precipitate-free zones in the fine-grained material. Mechanical testing demonstrates that the ECA-pressed material exhibits high strength and good ductility at room temperature compared to conventional Al alloys containing Li. Elongations of up to {approximately} 550 pct may be achieved at an elevated temperature of 603 K in the ECA-pressed condition, thereby confirming that, in this condition, the alloy may be a suitable candidate material for use in superplastic forming operations.},

  doi          = {10.1007/s11661-998-0170-6},

  url          = {https://www.osti.gov/biblio/605821},
  journal      = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science},
number       = 1,

  volume       = 29,

  place        = {United States},

  year         = {Thu Jan 01 00:00:00 EST 1998},

  month        = {Thu Jan 01 00:00:00 EST 1998}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1007/s11661-998-0170-6

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Structural evolution and the Hall-Petch relationship in an Al-Mg-Li-Zr alloy with ultra-fine grain size

Journal Article Furukawa, Minoru; Iwahashi, Yoshinori; Horita, Zenji; ... - Acta Materialia

Experiments were conducted on an Al-5.5% Mg-2.2% Li-0.12% Zr alloy to investigate the feasibility of introducing an ultra-fine grain size using equal-channel angular (ECA) pressing and of retaining an ultra-fine grain size at elevated temperatures. It is shown that ECA pressing is capable of reducing the grain size from an initial value of {approximately}400 {micro}m to a value of {approximately}1.2 {micro}m. However, the microstructure after ECA pressing is heterogeneous, with many areas of equiaxed grains having high angle grain boundaries and some regions of subgrains with boundaries having low angles of misorientation. Unlike earlier experiments on Al-Mg binary alloys, itmore »« less
https://doi.org/10.1016/S1359-6454(97)00120-1
Characterization of superplastic deformation behavior of a fine grain 5083 Al alloy sheet

Journal Article Verma, R; Friedman, P; Ghosh, A; ... - Metallurgical Transactions, A

Superplastic deformation behavior of a fine grain 5083 Al sheet (Al-4.2 pct Mg-0.7 pct Mn, trade name FORMALL 545) has been investigated under uniaxial tension over the temperature range of 500 C to 565 C. Strain rate sensitivity values >0.3 were observed over a strain rate range of 3 {times} 10{sup {minus}5} s{sup {minus}1} to 1 {times} 10{sup {minus}2} s{sup {minus}1}, with a maximum value of 0.65 at 5 {times} 10{sup {minus}4} s{sup {minus}1} and 565 C. Tensile elongations at constant strain rate exceeded 400 pct; elongations in the range of 500 to 600 pct were obtained under constant crossheadmore »« less
https://doi.org/10.1007/BF02651938
High strain rate superplasticity in an Al-Mg alloy containing scandium

Journal Article Komura, Shogo; Horita, Zenji; Nemoto, Minoru; ... - Scripta Materialia

Superplastic forming is a well-established industrial process for the fabrication of complex shapes in sheet metals. It has been suggested that it may be possible to achieve superplasticity at high strain rates in conventional materials by making a substantial reduction in the grain size. This may be achieved by using a process such as equal-channel angular (ECA) pressing, where the sample is subjected to intense plastic straining in simple shear, because it is well established that ECA pressing leads to significant grain refinement in large-grained polycrystalline materials down to the submicrometer or even the nanometer level. High strain rate superplasticitymore »« less
https://doi.org/10.1016/S1359-6462(98)00099-2
Microstructural evolution and superplastic deformation behavior of fine grain 5083Al

Journal Article Friedman, P; Ghosh, A - Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

The microstructural evolution during superplastic deformation of a fine grain Al-4.7 pct Mg alloy (5083Al) has been studied quantitatively. Starting from an average grain size of 7 {micro}m, grain growth was monitored in this alloy both under static annealing and with concurrent superplastic deformation at a high test temperature of 550 C. Grain size was averaged from measurements taken in longitudinal, transverse, and thickness directions and was found to grow faster during concurrent superplastic deformation than for static annealing. A grain growth law based on an additive nature between time-based and strain-based growth behavior was used to quantify the dynamicsmore »« less
https://doi.org/10.1007/BF02595632
The characteristics of cavitation during superplastic deformation of a warm-rolled Al-Li-Cu-Mg-Zr alloy

Journal Article Liu, Q; Huang, X; Yang, J; ... - Scripta Metallurgica; (United States)

The process of superplastic forming has become important in numerous commercial applications. However, there may be some deleterious defects on the properties of superplastically-formed components due to the presence of minor levels of cavitation introduced during the forming process. Thus, it is important to obtain information on nucleation, growth and interlinkage of cavities in a wide range of superplastic materials. Two different thermomechanical processing routes may be employed to develop fine grain sizes conducive to superlasticity in Al-Li alloys. In one of them, a fine grain size microstructure is obtained by static recrystallization prior to superplastic deformation, and in another,more »« less
https://doi.org/10.1016/0956-716X(91)90198-A

Similar Records