Hot deformation and dynamic recrystallization of Al-5Mg-0.8Mn alloy

McQueen, H.J.; Evangelìsta, E.; Bowles, J.S; Crawford, Grant A.

doi:10.1179/030634584790419854

Cited by 125 publications

(51 citation statements)

References 24 publications

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“…This is discussed in more detail in the previous section. It is of interest here because, although aluminum alloys do not normally undergo DRX (because of their low hot worked dislocation densities), the nucleation and growth of new grains can indeed be induced in the presence of sufficient quantities of hard second phase [145]. These appear to raise the local dislocation densities and lattice curvatures above the critical levels needed for the initiation and propagation of DRX.…”

Section: Oriented Nucleationmentioning

confidence: 99%

Current issues in recrystallization: a review

Doherty¹,

Hughes²,

Humphreys³

et al. 1997

Materials Science and Engineering: A

2,059

623

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The current understanding of the fundamentals of recrystallization is summarized. This includes understanding the as-deformed state. Several aspects of recrystallization are described: nucleation and growth, the development of misorientation during deformation, continuous, dynamic, and geometric dynamic recrystallization, particle effects, and texture. This article is authored by the leading experts in these areas. The subjects are discussed individually and recommendations for further study are listed in the final section. © 1997 Elsevier Science S.A.

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Section: Oriented Nucleationmentioning

confidence: 99%

Current issues in recrystallization: a review

Doherty¹,

Hughes²,

Humphreys³

et al. 1997

Materials Science and Engineering: A

2,059

623

View full text Add to dashboard Cite

show abstract

“…Based on available data in the published studies. [68,79,86,89,90] the increase in Q of Al alloys, where Mg is the predominant solute, due to the presence of second-phase particles as a function of f=l is demonstrated in Figure 9(b), where the linear fitting coefficient is~0.99. In terms of Figures 9(a) and (b), the Q value of 5083 Al in the present study can be estimated as 193 kJ/mol via extrapolation (solute Mg concentration 2.93 wt pct in terms of APT measurement in Section III-E, and f=l = 1.23 lm À1 based on the values of f = 3.68 vol pct and l = 30 nm as presented in Sections III-E and III-A, respectively).…”

Section: B Mechanisms Underlying Stress-induced Grain Growth During mentioning

confidence: 98%

“…In the present study (5083 Al deformed at temperature of 673 K (400°C) with strain rate of 0.8 s À1 as presented in Section II), the strain value corresponding to onset of the steady state is estimated as 0.3 to 0.5. [78,79] Under steady-state conditions, the subgrain size remains almost unchanged with increasing the magnitude of the strain. When the spacing decreases, the HAGBs always become corrugated due to the surface tension of low-angle SGBs.…”

Section: B Mechanisms Underlying Stress-induced Grain Growth During mentioning

confidence: 99%

Stress-Induced Grain Growth in an Ultra-Fine Grained Al Alloy

Lin

Wen

Liu

et al. 2014

Metall Mater Trans B

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This paper reports on a study of the stress-induced grain growth phenomenon in the presence of second-phase particles and solutes segregated at grain boundaries (GBs) during high-temperature deformation of an ultra-fine grained (UFG) Al alloy synthesized via the consolidation of mechanically milled powders. Our results show that grain growth was essentially inhibited during annealing at 673 K (400°C) in the absence of an externally applied stress, whereas in contrast, grain growth was enhanced by a factor of approximately 2.7 during extrusion at 673 K (400°C). These results suggest that significant grain growth during hot extrusion was attributable to the externally applied stresses stemming from the state of stress imposed during extrusion and that the externally applied stresses can overcome the resistance forces generated by second-phase particles and solutes segregated at GBs. The mechanisms underlying stress-induced grain growth were identified as GB migration and grain rotation, which were accompanied by dynamic recovery and possible geometric dynamic recrystallization, while discontinuous dynamic recrystallization did not appear to be operative. he earned his B.S. with honors in solid mechanics from Brown University. His research interests include the synthesis and behavior of nanostructured and multi-scale materials with particular emphasis on processing fundamentals and physical behavior; thermal spray processing of nanostructured materials; spray atomization and deposition of structural materials; high temperature-high pressure atomization processes; mathematical modeling of advanced materials and processes; and additive manufacturing. He has published 515 journal and 225 conference publications on topics ranging from nanomaterials to extremely strong aluminum alloys. Prof. Lavernia has delivered more than 150 invited lectures and seminars in over 17 countries. He

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“…In the present study (5083 Al deformed at temperature of 673 K (400°C) with strain rate of 0.8 s À1 as presented in Section I), the strain value corresponding to onset of the steady state is estimated as 0.3 to 0.5. [78,79] Under steady-state conditions, the subgrain size remains almost unchanged with increasing the magnitude of the strain. When the spacing decreases, the HAGBs always become corrugated due to the surface tension of low-angle SGBs.…”

Section: B Mechanisms Underlying Stress-induced Grain Growth During mentioning

confidence: 99%

“…Based on available data in the published studies. [68,79,86,89,90] the increase in Q of Al alloys, where Mg is the predominant solute, due to the presence of secondphase particles as a function of f=l is demonstrated in Figure 9 Inspection of the published literature reveals that, during high-temperature deformation, the d value of a single-phase Al alloy is primarily determined by deformation conditions (i.e., Zener-Hollomon parameter) and insensitive to the particular alloy compositions [68,91] ; however, the d value can be effectively reduced in an Al alloy containing the dispersion of fine second-phase particles. [68] Based on the discussion, it can be presumably suggested that the presence of second-phase particles changes the values of A and B in Eq.…”

Section: B Mechanisms Underlying Stress-induced Grain Growth During mentioning

confidence: 99%

Erratum to: Stress-Induced Grain Growth in an Ultra-Fine Grained Al Alloy

Lin

Wen

Liu

et al. 2014

Metall Mater Trans B

View full text Add to dashboard Cite

This paper reports on a study of the stress-induced grain growth phenomenon in the presence of second-phase particles and solutes segregated at grain boundaries (GBs) during high-temperature deformation of an ultra-fine grained (UFG) Al alloy synthesized via the consolidation of mechanically milled powders. Our results show that grain growth was essentially inhibited during annealing at 673 K (400°C) in the absence of an externally applied stress, whereas in contrast, grain growth was enhanced by a factor of approximately 2.7 during extrusion at 673 K (400°C). These results suggest that significant grain growth during hot extrusion was attributable to the externally applied stresses stemming from the state of stress imposed during extrusion and that the externally applied stresses can overcome the resistance forces generated by second-phase particles and solutes segregated at GBs. The mechanisms underlying stressinduced grain growth were identified as GB migration and grain rotation, which were accompanied by dynamic recovery and possible geometric dynamic recrystallization, while discontinuous dynamic recrystallization did not appear to be operative. His research interests include the synthesis and behavior of nanostructured and multi-scale materials with particular emphasis on processing fundamentals and physical behavior; thermal spray processing of nanostructured materials; spray atomization and deposition of structural materials; high temperature-high pressure atomization processes; mathematical modeling of advanced materials and processes; and additive manufacturing. He has published 515 journal and 225 conference publications on topics ranging from nanomaterials to extremely strong aluminum alloys. Prof. Lavernia has delivered more than 150 invited lectures and seminars in over 17 countries. He

show abstract

Hot deformation and dynamic recrystallization of Al-5Mg-0.8Mn alloy

Cited by 125 publications

References 24 publications

Current issues in recrystallization: a review

Current issues in recrystallization: a review

Stress-Induced Grain Growth in an Ultra-Fine Grained Al Alloy

Erratum to: Stress-Induced Grain Growth in an Ultra-Fine Grained Al Alloy

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