Effect of a Trace Addition of Sn on the Aging Behavior of Al–Mg–Si Alloy with a Different Mg/Si Ratio

Ma, Lixia; Tang, Jianguo; Tu, Wenbin; Ye, Lingying; Jiang, Haichun; Zhan, Xin; Zhao, Jinbing

doi:10.3390/ma13040913

Cited by 9 publications

(8 citation statements)

References 34 publications

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“…15 A similar observation was also reported by Zhang et al 16 and further the authors concluded that at an artificial ageing temperature of 180 °C, the effect of Sn on age hardness depends on the composition of the Al-Mg-Si alloy. It was also reported 17 that in Mg-rich Al-Mg-Si alloy (Mg/Si = 1.7) at an ageing temperature of 180 °C, Sn (0.1 wt%) increases the number density of b 00 precipitate and improves the mechanical properties, whereas in Si-rich Al-Mg-Si alloy (Mg/Si = 0.58) at ageing temperature of 180 °C, Sn (1.1 wt%) weakens the strengthening effect of the b 00 precipitate and thereby decreases the mechanical properties of the Al-Mg-Si alloy. A similar observation was reported by He et al 18 in Si-rich Al-Mg-Si alloy (Mg/Si = 0.92) containing a high amount of Sn (0.4 wt%).…”

Section: Introductionmentioning

confidence: 72%

“…11,12 The effect of alloying Sn on the mechanical properties of the Al-Mg-Si alloy very much depends on the Mg/Si ratio and the ageing temperature. [13][14][15][16][17][18] At pre-aged (110 °C) and paint bake (165 °C) conditions, the negative effect of Sn (0.04 wt%) on the mechanical properties in high Mg-rich Al-Mg-Si alloy (Mg/Si = * 2) was observed by Glockel et al 14 However, the simultaneous addition of Zn (3 wt%) and Sn was found to prevent the negative effect and significantly improve the mechanical properties of the alloy. This was because Sn suppresses Mg-Si co-cluster formation, whereas Zn promotes Mg-Si co-cluster formation.…”

Section: Introductionmentioning

confidence: 98%

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Structure–Property Correlation of Al–Mg–Si Alloys Micro-alloyed with Sn

Baruah¹,

Borah²

2021

Inter Metalcast

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Microstructure and mechanical properties of the cast and wrought Al-Mg-Si alloy micro-alloyed with 0.04 wt% and 0.08 wt% Sn were investigated at various processing conditions, viz. as-cast, solutionised, homogenised, hot rolled and peak-aged. Additionally, fracture surfaces of the alloys were also examined in the as-cast, peak-aged cast and peak-aged rolled conditions. It was observed that 0.04 wt% Sn favours the formation of a lamella-like eutectic Al ? Mg 2 Si, whereas 0.08 wt% Sn favours the formation of plate/rod-like Mg 2 Si. The formation of the former deteriorated the hardness and tensile strength, but improves the ductility, whereas the formation of the later was found to contribute to the hardness, tensile strength as well as ductility of the Al-Mg-Si alloy. Homogenisation treatment had reduced the hardness of all the alloys to the lowest value due to the dissolution and spheroidisation of the intermetallic phases. However, hot rolling had significantly increased the hardness, tensile strength and ductility of the alloys. Thus, the increase in hardness, tensile strength and ductility were more prominent in the peakaged rolled alloys relative to the peak-aged cast alloys. At the studied processing stages, the hardness and tensile strength of Al-Mg-Si alloy were found to decrease with the addition of 0.04 wt% Sn and increase with the addition of 0.08 wt% Sn. However, the ductility increased with Sn addition, and the increment was more prominent when micro-alloyed with 0.04 wt% Sn. Improvement in ductility in 0.04 wt% Sn alloy could be attributed to the formation of script-like Al(Fe, Mn)Si phase, whereas in 0.08 wt% Sn alloy could be attributed to the formation of ductile Mg 2 (Si, Sn) phase. Furthermore, the fractography study had revealed that the fracture in the alloys was mainly developed by the cracking of Al(Fe, Mn)Si intermetallic particles. The fractures mode in the as-cast and peak-aged cast alloys was mainly by transgranular brittle with a cleavage fracture surface, whereas in the peak-aged rolled alloys was mainly by transgranular ductile with a dimpled fracture surface.

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Section: Introductionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 98%

Structure–Property Correlation of Al–Mg–Si Alloys Micro-alloyed with Sn

Baruah¹,

Borah²

2021

Inter Metalcast

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“…It was also observed that Zinc addition eliminates the negative effect of Sn addition in the properties of high magnesium content 6000 Al alloy [6]. Sn addition in 6000 alloys had been also shown as a potential accelerating artificial age hardening agent [7][8][9]. He et.…”

Section: Introductionmentioning

confidence: 96%

“…Alloying elements like Mg and Si in 6000 alloys reduce the dislocation motion through formation of hardening Mg 2 Si precipitates, thereby increasing the mechanical strength [4]. Sn in 6000 Al alloys is a potential trace element [5][6][7][8][9][10]. Sn introduction slows down the natural ageing process of 6000 Al alloys, thus helping in keeping the alloy stable during the transportation period from one place to another [5].…”

Section: Introductionmentioning

confidence: 99%

Impact behaviour and fractography of 6061 alloy with Trace addition of Sn

Baruah¹,

Borah²

2022

Frattura Ed Integrità Strutturale

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The impact behaviour of 6061 alloy with trace amount of 0, 0.04, and 0.08 wt.% Sn was studied in the as-cast (AC), as-roll (AR) and peak-age roll (PAR) processing state. Additionally, the fracture mechanism was also studied in the AC and PAR state. The experimental investigation revealed that at all processing states, trace addition of Sn improves the impact strength of the 6061 alloy. Compared to the other processing states, the PAR condition contribute most to the impact strength. Fractography analyses showed that the fracture in the alloys occurred primarily by the crack propagation of Al(Fe, Mn)Si particles. The fractures in the AC alloys took place by mixed ductile and brittle mode by larger ductile dimples, cracks and cleavages, while in the PAR alloys was primarily by ductile mode by the smaller dimple fractures.

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“…It has been reported that 10% of weight reduction in vehicle improves about 6-8% in the fuel efficiency [8,9]. Several high-strength and high-integrity Al-Si-Cu and Al-Mg-Si die-cast aluminum alloys have thus been developed for the automotive applications [10]. The increasing applications of lightweight Al-Si cast alloys lead to the development of novel or modified Al-Mg-Si alloys, since the inferior ductility and toughness of normal cast aluminum alloys failed to meet rigorous requirements of structural component subjected to cyclic stresses due to the existence of impurities and casting defects [11,12].…”

Section: Introductionmentioning

confidence: 99%

Cyclic Deformation Behavior of A Heat-Treated Die-Cast Al-Mg-Si-Based Aluminum Alloy

Mohammed

Gupta

et al. 2020

Materials

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The purpose of this investigation was to study the low-cycle fatigue (LCF) behavior of a newly developed high-pressure die-cast (HPDC) Al-5.5Mg-2.5Si-0.6Mn-0.2Fe (AlMgSiMnFe) alloy. The effect of heat-treatment in comparison with its as-cast counterpart was also identified. The layered (α-Al + Mg2Si) eutectic structure plus a small amount of Al8(Fe,Mn)2Si phase in the as-cast condition became an in-situ Mg2Si particulate-reinforced aluminum composite with spherical Mg2Si particles uniformly distributed in the α-Al matrix after heat treatment. Due to the spheroidization of intermetallic phases including both Mg2Si and Al8(Fe,Mn)2Si, the ductility and hardening capacity increased while the yield stress (YS) and ultimate tensile strength (UTS) decreased. Portevin–Le Chatelier effect (or serrated flow) was observed in both tensile stress–strain curves and initial hysteresis loops during cyclic deformation because of dynamic strain aging caused by strong dislocation–precipitate interactions. The alloy exhibited cyclic hardening in both as-cast and heat-treated conditions when the applied total strain amplitude was above 0.4%, below which cyclic stabilization was sustained. The heat-treated alloy displayed a larger plastic strain amplitude and a lower stress amplitude at a given total strain amplitude, demonstrating a superior fatigue resistance in the LCF regime. A simple equation based on the stress amplitude of the first and mid-life cycles ((Δσ/2)first, (Δσ/2)mid) was proposed to characterize the degree of cyclic hardening/softening (D): D=±(Δσ/2)mid − (Δσ/2)first(Δσ/2)first, where the positive sign “+” represents cyclic hardening and the negative sign “−“ reflects cyclic softening.

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Effect of a Trace Addition of Sn on the Aging Behavior of Al–Mg–Si Alloy with a Different Mg/Si Ratio

Cited by 9 publications

References 34 publications

Structure–Property Correlation of Al–Mg–Si Alloys Micro-alloyed with Sn

Structure–Property Correlation of Al–Mg–Si Alloys Micro-alloyed with Sn

Impact behaviour and fractography of 6061 alloy with Trace addition of Sn

Cyclic Deformation Behavior of A Heat-Treated Die-Cast Al-Mg-Si-Based Aluminum Alloy

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