The effect of trace Sc on the quench sensitivity of AL–7Si–0.6 Mg alloys

Tzeng, Yu-Chih; Wu, Chih Ting; Lee, Sheng Long

doi:10.1016/j.matlet.2015.08.108

Cited by 25 publications

(11 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In 2010 Shuey and Tiryakioglu published a reviewing chapter on "quenching of aluminium alloys" including experimental results on a broad range of alloys as well as theoretical options for their evaluation [44]. Different quenching paths have therefore been frequently used for samples, for instance by using different quenching media [45][46][47][48][49] or by applying Jominy end-quench tests [50][51][52][53]. Subsequent post-quench analysis of certain properties has led to the assessment of the quench sensitivity.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

View full text Add to dashboard Cite

show abstract

“…10,11 The strengthening involved refined crystalline, substructure, and precipitation strengthening mechanisms resulting from the Al 3 Sc phase. Trace amounts of Sc were added by Zhou et al [12][13][14] to the Al-Mg alloy and recrystallization was controlled, clearly decreasing the grain granularity of alloy after casting, homogeneity, and the fraction of solid solution. Stratification clearly occurred during tensile fracture, improving the aging strengthening effect of the alloy.…”

Section: Introductionmentioning

confidence: 99%

Effect of trace Sr and Sc contents and ultrasonic vibration on the microstructure and mechanical properties of the A380 alloy

Lei

Chen

et al. 2018

Advances in Mechanical Engineering

View full text Add to dashboard Cite

The effect and mechanism of trace amounts of Sr and Sc in the A380 alloy under ultrasonic vibration (ultraviolet) modification on the microstructure and mechanical properties were investigated. The results showed that the primary a phase in A380 could be refined by adding Sr and Sc under ultraviolet treatment, the secondary dendrite spacing decreased significantly, and the thick dendritic shapes transformed to tiny disperse isometric crystals. The highest ultimate tensile strength (about 302 MPa) was obtained by adding 0.2 Sr + 0.4 Sc (wt%) and applying ultraviolet treatment. The highest hardness (about 113 BHN) and elongation (about 4.65%) were obtained by adding 0.15% Sr + 0.3% Sc and applying ultraviolet treatment, and the minimum grain size (about 27 mm) and maximum shape factor (around 0.8) were obtained for the same composition.

show abstract

“…With the increase of Mn content, α-Al(Mn,Fe)Si nally transforms from branched shape to Chinese script shape which usually occurs when Mn and Fe have an appropriate ratio. Among the trace alloying elements, Sc is an excellent grain re ner and strengthening element in Al alloys [14][15][16]. The Sc-containing Al alloys form Al 3 Sc precipitates at the nanometer scale in the grains [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Properties and Corrosion Resistance of As-Cast Al-12Si-1.0Mn-0.6Mg-xSc Alloys

Yang

Wang

Peng

et al. 2021

Preprint

View full text Add to dashboard Cite

Al-12Si-1.0Mn-0.6Mg-xSc (x = 0, 0.1, 0.2, and 0.3) alloys for electronic packaging were prepared by ingot metallurgy, and the microstructure, mechanical properties, thermo-physical properties and corrosion resistance were compared. A fine and dispersed Al3Sc phase is observed and the acicular β-Fe phase transforms into a Chinese character or massive α-Fe phase in the alloys with Sc addition. When the Sc content increases from 0 to 0.3%, the secondary dendritic arm spacing and the size of the eutectic Si reduce from 17.9 μm and 5.3 μm to 12.8 μm and 3.1 μm, respectively. Simultaneously, the morphology of eutectic Si changes from a rough long rod to an ellipsoid. The thermal expansion coefficient and thermal conductivity of the alloys reduce slightly with increasing the Sc content. The flexural strength of 291.9 MPa is obtained for the Al-12Si-1.0Mn-0.6Mg-0.3Sc, an increment of 20.4% as compared with the Sc-free alloy. Furthermore, the corrosion resistance of the alloys is improved by the minor Sc addition.

show abstract

The effect of trace Sc on the quench sensitivity of AL–7Si–0.6 Mg alloys

Cited by 25 publications

References 16 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 trace Sr and Sc contents and ultrasonic vibration on the microstructure and mechanical properties of the A380 alloy

Microstructure, Properties and Corrosion Resistance of As-Cast Al-12Si-1.0Mn-0.6Mg-xSc Alloys

Contact Info

Product

Resources

About

The effect of trace Sc on the quench sensitivity of AL–7Si–0.6 Mg alloys

Cited by 25 publications

References 16 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 trace Sr and Sc contents and ultrasonic vibration on the microstructure and mechanical properties of the A380 alloy

Microstructure, Properties and Corrosion Resistance of As-Cast&nbsp;Al-12Si-1.0Mn-0.6Mg-xSc Alloys

Contact Info

Product

Resources

About

Microstructure, Properties and Corrosion Resistance of As-Cast Al-12Si-1.0Mn-0.6Mg-xSc Alloys