Continuous cooling precipitation diagram of cast aluminium alloy Al-7Si-0.3Mg

Milkereit, Benjamin; Fröck, Hannes; Schick, Christoph; Keßler, Olaf

doi:10.1016/s1003-6326(14)63308-2

Cited by 25 publications

(13 citation statements)

References 15 publications

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“…For this reason, the difference in the solution treatments between Al7Si0.3Mg and Al10Si0.3 should be kept in mind when considering Figure 73. Figure 73 shows that the maximum hardness achievable for the three alloys is very similar (111 to 116 HV1), and this hardness is achieved using high cooling rates in excess of ≈100 K/s [131,214]. This result perfectly fits with those of Ref.…”

Section: Alsimg Cast Alloyssupporting

confidence: 81%

“…In this work, three variants of AlSiMg cast alloys are assessed, namely permanent mould-cast Al7Si0.3Mg [214], high-pressure die-cast Al10Si0.3Mg [131] and additively manufactured (laser-beam melted, LBM) Al10Si0.3Mg [131]. Figure 69 compares these three cast alloy variants in terms of their DSC cooling curves (A, B) and the resulting precipitation enthalpies and hardness after ageing (C, D).…”

Section: Alsimg Cast Alloysmentioning

confidence: 99%

“…It is likely that these semi-coherent precursor precipitates form during the LTRs, which have a peak at about 350 • C in the cast alloy variants. [214]; (B) cooling DSC curves for two variants of Al10Si0.3Mg-one of the variants was produced by high-pressure die-casting, the second by laser beam melting, [131,215]; (C,D) values of specific precipitation enthalpy and hardness after ageing for the three cast alloys.…”

Section: Alsimg Cast Alloysmentioning

confidence: 99%

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Review of the Quench Sensitivity of Aluminium Alloys: Analysis of the Kinetics and Nature of Quench-Induced Precipitation

et al. 2019

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For aluminium alloys, precipitation strengthening is controlled by age-hardening heat treatments, including solution treatment, quenching, and ageing. In terms of technological applications, quenching is considered a critical step, because detrimental quench-induced precipitation must be avoided to exploit the full age-hardening potential of the alloy. The alloy therefore needs to be quenched faster than a critical cooling rate, but slow enough to avoid undesired distortion and residual stresses. These contrary requirements for quenching can only be aligned based on detailed knowledge of the kinetics of quench-induced precipitation. Until the beginning of the 21st century, the kinetics of relevant solid-solid phase transformations in aluminium alloys could only be estimated by ex-situ testing of different properties. Over the past ten years, significant progress has been achieved in this field of materials science, enabled by the development of highly sensitive differential scanning calorimetry (DSC) techniques. This review presents a comprehensive report on the solid-solid phase transformation kinetics in Al alloys covering precipitation and dissolution reactions during heating from different initial states, dissolution during solution annealing and to a vast extent quench-induced precipitation during continuous cooling over a dynamic cooling rate range of ten orders of magnitude. The kinetic analyses are complemented by sophisticated micro- and nano-structural analyses and continuous cooling precipitation (CCP) diagrams are derived. The measurement of enthalpies released by quench-induced precipitation as a function of the cooling rate also enables predictions of the quench sensitivities of Al alloys using physically-based models. Various alloys are compared, and general aspects of quench-induced precipitation in Al alloys are derived.

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Section: Alsimg Cast Alloyssupporting

confidence: 81%

Section: Alsimg Cast Alloysmentioning

confidence: 99%

Section: Alsimg Cast Alloysmentioning

confidence: 99%

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Review of the Quench Sensitivity of Aluminium Alloys: Analysis of the Kinetics and Nature of Quench-Induced Precipitation

et al. 2019

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“…Water has 1.0-1.1 of H value, and oil has 0.30-0.35 of H value [9,14]. The characteristic of water quenching produce non-uniform geometry and high temperature gradient on specimen, which generated the residual stress and the distortion [5]. Al 2 O 3 particle affected distortion of the specimen.…”

Section: Fig 1 Stir Casting Equipmentmentioning

confidence: 99%

“…Quenching rate must be fast to obtain maximum strength of material. On the other hand, quenching rate must be slow to avoid the distortion [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of quenching agent on dimension stability of Al 6061-Al₂O₃composite

Akbar

Surojo

Ariawan

2018

MATEC Web of Conferences

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Al 6061-Al2O3 composite is a lightweight materials that can be used as an alternative material in automotive parts. T6 heat treatment is generally used on aluminium alloy series 6xxx . On T6 heat treatment process, material heated to temperature for obtaining a single phase of α, quenched and then continued by artificial ageing. Quenching is critical step because distortion can be occur in material. The aim of this research is to investigated effect of quenching agent and electroless coating treatment of Al2O3 in distortion at Al 6061-Al2O3 composite . The distortion was measured by dimensional change in the specimen. Coordinate Measuring Machine (CMM) was used to measured distortion based on coordinate change. Lower distortion are occur on 10E and 10N specimens. Electroless coating process on the reinforcement is more effective to obtain lower distortion on Al 6061-Al2O3 composite. The severity (H) of quenchant influenced distortion on specimen. Higher H value produce higher distortion on Al 6061-Al2O3 composite.

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Precipitation and Dissolution Kinetics in Metallic Alloys with Focus on Aluminium Alloys by Calorimetry in a Wide Scanning Rate Range

Milkereit

Keßler

Schick

2016

Fast Scanning Calorimetry

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Continuous cooling precipitation diagram of cast aluminium alloy Al-7Si-0.3Mg

Cited by 25 publications

References 15 publications

Review of the Quench Sensitivity of Aluminium Alloys: Analysis of the Kinetics and Nature of Quench-Induced Precipitation

Review of the Quench Sensitivity of Aluminium Alloys: Analysis of the Kinetics and Nature of Quench-Induced Precipitation

Effect of quenching agent on dimension stability of Al 6061-Al₂O₃composite

Precipitation and Dissolution Kinetics in Metallic Alloys with Focus on Aluminium Alloys by Calorimetry in a Wide Scanning Rate Range

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Continuous cooling precipitation diagram of cast aluminium alloy Al-7Si-0.3Mg

Cited by 25 publications

References 15 publications

Review of the Quench Sensitivity of Aluminium Alloys: Analysis of the Kinetics and Nature of Quench-Induced Precipitation

Review of the Quench Sensitivity of Aluminium Alloys: Analysis of the Kinetics and Nature of Quench-Induced Precipitation

Effect of quenching agent on dimension stability of Al 6061-Al2O3composite

Precipitation and Dissolution Kinetics in Metallic Alloys with Focus on Aluminium Alloys by Calorimetry in a Wide Scanning Rate Range

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Product

Resources

About

Effect of quenching agent on dimension stability of Al 6061-Al₂O₃composite