Supportive strengthening role of Cr-rich phase on Al–Si multicomponent piston alloy at elevated temperature

Li, Yunguo; Yang, Yang; Wu, Yuying; Wei, Zuoshan; Liu, Xiangfa

doi:10.1016/j.msea.2011.02.047

Cited by 67 publications

(27 citation statements)

References 14 publications

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“…8b), but they do not appear to strongly contribute to the fracture initiation and propagation. This supports what is already reported by different authors about the positive contribution to tensile properties of the modification of intermetallic morphology due to Cr and Mn addition to Al-Si-Mg alloys [7,8,17]. Intermetallic particles seem to be not so critical for the tensile strength of heat-treated AlSi3Cr alloy, while most of the ductility loss is probably correlated to precipitation of hardening Mg 2 Si particles.…”

Section: Microstructural Analysis Of Tensile Specimenssupporting

confidence: 91%

“…In addition, as explained in a previous work by the authors [12], during solution treatment Cr-containing dispersoids also form in the aluminum matrix. It was demonstrated that they are responsible of an increase in material hardness and influence both tensile properties and toughness [7,8,17]. Intermetallic particles are not significantly affected by the heat treatment [18].…”

Section: Microstructural Analysis and Morphological Analysis Of Intermentioning

confidence: 99%

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Investigation of mechanical properties of AlSi3Cr alloy

Tocci

Pola

Montesano

et al. 2017

Frattura Ed Integrità Strutturale

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In the present paper, microstructural and mechanical properties of an innovative AlSi3Mg alloy were studied. Particularly, the effect of the addition of Cr and Mn on tensile strength and impact toughness was evaluated. In fact, the presence of these elements leads to the formation of an intermetallic phase with a globular or polyhedral morphology. It was therefore investigated the role played by Cr-Mn containing particles in the failure mechanism and the influence of the heat treatment parameters. Moreover, tensile and impact tests were performed on A356 samples in T6 condition, whose results were compared with the performance of the innovative alloy. Considering the static properties, the innovative alloy showed remarkable values of tensile strength, while ductility was improved only after heat treatment optimization. Poor impact toughness values were measured and the microstructural analysis confirmed the presence of coarse intermetallics, acting as crack initiation and propagation particles, on the fracture surfaces.

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Section: Microstructural Analysis Of Tensile Specimenssupporting

confidence: 91%

Section: Microstructural Analysis and Morphological Analysis Of Intermentioning

confidence: 99%

Investigation of mechanical properties of AlSi3Cr alloy

Tocci

Pola

Montesano

et al. 2017

Frattura Ed Integrità Strutturale

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“…In the case of single addition, they found Cr is more effective in decreasing the content of rod-like β-phase and increasing the content of α-phase than Mn. Li et al [5] also found α-Al(Fe, Cr)Si formed after 0.5 wt% Cr and 0.8 wt% Fe additions in multicomponent Al-Si-Cu-Mg-Ni piston alloys. By adding Cr, they could partly replace silicon atoms in β-AlFeSi phase to form α-Al(Fe, Cr)Si.…”

Section: Characterization Of Eutectic Al-si Alloysmentioning

confidence: 92%

“…However, it is well-known that the pistons are working under very extreme and complicated environment, and the materials used for pistons should be able to withstand the temperatures from 350 to 400 o C, Therefore, the superb high temperature (HT) strength of such alloys is the important design criteria [5,6] . In order to improve the HT strength of such alloys, alloying is one of the most adopted methods.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cr content and heat-treatment on the high temperature strength of eutectic Al–Si alloys

Yang

Zhong

Chen

et al. 2015

Journal of Alloys and Compounds

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“…The multicomponent Al-Si-Cu-Ni-Mg-Fe alloys, inside the range of the eutectic Al-Si alloys, are the main choice of piston material in automotive industries [30 -32]. Since the service conditions for pistons are very tough and complicated, the Al-Si alloys are required to withstand longtime service at temperatures from 350 to 400 °C [33]. Therefore, the super HT strength is critical design of piston alloy.…”

Section: Introduction mentioning

confidence: 99%

Effect of Er Addition on the High Temperature Strength of Al-Si-Cu-Ni-Mg-Fe Piston Alloys

Li¹,

Xia²,

Wu³

et al. 2019

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In this study, the dependence of Er addition (0-0.49 wt %) on the microstructural evolution and related tensile strength at high temperature (HT) were investigated for the eutectic Al-Si piston alloys. The results showed there were intermetallic compounds of -Al3CuNi, -Al7Cu4Ni, Al4Cu2Mg8Si7, β-AlFeSi and Al3(Er, Cu, Fe) (Ni, Si) 2 identified at T5 states. Herein, the added Er element has led to the formation of the star-like and the irregular-shaped Al3(Er, Cu, Fe) (Ni, Si) 2 phase. The phase was stable which showed little change in both size and composition experienced solid solution at HT during the T6 treatment. For the HT strengths (350 oC), the T5 state alloys have higher UTSs than those at T6 state, both of which were reduced gradually with the increasing Er contents. The variation of HT strengths caused by the Er addition was explained by the microstructral evolution, namely Al3(Er, Cu, Fe) (Ni, Si)2 phase formation

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Supportive strengthening role of Cr-rich phase on Al–Si multicomponent piston alloy at elevated temperature

Cited by 67 publications

References 14 publications

Investigation of mechanical properties of AlSi3Cr alloy

Investigation of mechanical properties of AlSi3Cr alloy

Effect of Cr content and heat-treatment on the high temperature strength of eutectic Al–Si alloys

Effect of Er Addition on the High Temperature Strength of Al-Si-Cu-Ni-Mg-Fe Piston Alloys

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