The Precipitation Behaviour of High-Purity Al-Mn Alloys

Haan, P.C.M. De; Rijkom, J. van; Söntgerath, J.A.H.

doi:10.4028/www.scientific.net/msf.217-222.765

Cited by 18 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This indicates the decomposition of supersaturated solid solution hardly occurred during HOMO. Kolby et al 20) and Haan et al 21) also reported that the Mn precipitation is sluggish in high-purity Al-Mn binary alloy. In contrast to AM, AMF and AMS showed the apparent increase of electrical conductivity after HOMO.…”

Section: Electrical Conductivity Change After Homomentioning

confidence: 94%

“…In contrast to AM, AMF and AMS showed the apparent increase of electrical conductivity after HOMO. It is because the addition of Fe or Si in Al-Mn based alloy promotes the decomposition of supersaturated Mn in solid solution during heat treatment by formation of Mncontaining secondary phases such as orthorhombic Al 6 (Mn,Fe) or cubic α-phase 6,[20][21][22] . Moreover, the change of electrical conductivity was dependent on the casting methods, representing different cooling rate during solidi cation.…”

Section: Electrical Conductivity Change After Homomentioning

confidence: 99%

See 1 more Smart Citation

Influence of Cooling Rate on Primary Particle and Solute Distribution in High-Speed Twin-Roll Cast Al-Mn Based Alloy Strip

2018

View full text Add to dashboard Cite

Binary Al-Mn, ternary Al-Mn-Fe and Al-Mn-Si alloys were prepared by different cooling rates during solidi cation using direct chill-casting and high-speed twin-roll casting. Mn concentration and solute distribution in Al matrix were examined. The Mn concentration in solid solution was considered almost equivalent in as-cast condition. In contrast, much amount of decomposition of supersaturated Mn in solid solution occurred in high-speed twin-roll cast alloys after homogenization. In high-speed twin-roll cast strips, ne distribution of constituent particles in Al-Mn-Fe alloy and homogeneous solute distribution in Al matrix in Al-Mn-Si alloy were obtained due to the high cooling rate of the high-speed twin-roll casting. After homogenization treatment, coarsening and spheroidization of the constituent particles were mainly observed in Al-Mn-Fe alloy, while formation of ne dispersoids was predominantly observed in Al-Mn-Si alloy. Such differences in microstructure resulted from the decomposition behavior of supersaturated Mn in solid solution.

show abstract

Section: Electrical Conductivity Change After Homomentioning

confidence: 94%

Section: Electrical Conductivity Change After Homomentioning

confidence: 99%

Influence of Cooling Rate on Primary Particle and Solute Distribution in High-Speed Twin-Roll Cast Al-Mn Based Alloy Strip

2018

View full text Add to dashboard Cite

show abstract

“…In alloys with very low Si, the α-Al(Fe,Mn)Si phase is not stable at high temperatures, however (see Figure 9(a)). Accordingly, the α-dispersoids will increasingly be re-dissolved and eventually replaced by Al 6 (Mn,Fe) as the stable phase [41][42][43], often with a rodlike appearance. In alloys with a high-Si concentration, the α-Al(Fe,Mn)Si phase is stable, in contrast, and α-dispersoids will prevail at high temperatures [20,22,[38][39][40].…”

Section: Evolution Of Dispersoids In Mg-free Alloys Aa 3103 and Aa 3003mentioning

confidence: 99%

Evolution of micro-chemistry during solidification and homogenisation of AA 3xxx aluminium–manganese alloys

Engler¹,

Brüggemann²,

Hasenclever³

2021

Materials Science and Technology

View full text Add to dashboard Cite

An important aspect of the characterisation of non-heat-treatable Al alloys is the constitution of the material in terms of its alloying elements in solid solution and, in turn, volume, size, morphology and species of second-phase particles. These constitutional characteristics, conveniently summarised as micro-chemistry, have an impact on physical and mechanical materials properties of Al semi-finished products. In the present study, the evolution of micro-chemistry in the Al–Mn alloys of the AA 3xxx series during solidification and homogenisation is analysed. Especially, we focus on the impact of additional alloy elements, including Si, Mg and Cu, on the phase selection during solidification and the changes in solute level and volume, size and type of second-phase particles during subsequent homogenisation.

show abstract

“…The Si and Fe content reduces the solubility of Mn in the Al matrix and enhances the precipitation of dispersoids (Hausch et al, 1978). The two main types of dispersoids in the commercial 3xxx alloys are the cubic -Al(Mn,Fe)Si phase and the orthorhombic Al 6 (Fe,Mn) phase (Li & Arnberg, 2003a,b;Hausch et al, 1978;Hutchinson et al, 1989;de Haan et al, 1996). With a low Si content the -Al(Mn,Fe)Si phase exists at low temperatures, but dissolves at higher temperatures.…”

Section: Introductionmentioning

confidence: 99%

Mackay icosahedron explaining orientation relationship of dispersoids in aluminium alloys

Muggerud

Holmestad

et al. 2014

Acta Crystallogr Sect B

View full text Add to dashboard Cite

The orientation relations (ORs) of the cubic icosahedral quasicrystal approximant phase α-Al(Fe,Mn)Si have been studied after low temperature annealing of a 3xxx wrought aluminium alloy by transmission electron microscopy. From diffraction studies it was verified that the most commonly observed OR for the α-Al(Fe,Mn)Si dispersoids is [1\bar 11]α // [1\bar 11]Al, (5\bar 2\bar 7)α // (011)Al. This orientation could be explained by assuming that the internal Mackay icosahedron (MI) in the α-phase has a fixed orientation in relation to Al, similar to that of the icosahedral quasi-crystals existing in this alloy system. It is shown that mirroring of the normal-to-high-symmetry icosahedral directions of the MI explains the alternative orientations, which are therefore likely to be caused by twinning of the fixed MI. Only one exception was found, which was related to the Bergman icosahedron internal to the T-phase of the Al-Mg-Zn system.

show abstract

The Precipitation Behaviour of High-Purity Al-Mn Alloys

Cited by 18 publications

References 0 publications

Influence of Cooling Rate on Primary Particle and Solute Distribution in High-Speed Twin-Roll Cast Al-Mn Based Alloy Strip

Influence of Cooling Rate on Primary Particle and Solute Distribution in High-Speed Twin-Roll Cast Al-Mn Based Alloy Strip

Evolution of micro-chemistry during solidification and homogenisation of AA 3xxx aluminium–manganese alloys

Mackay icosahedron explaining orientation relationship of dispersoids in aluminium alloys

Contact Info

Product

Resources

About