The effect of spheroidisation heat treatment on the creep resistance of a cast AlSi12CuMgNi piston alloy

Fernández-Gutiérrez, Ricardo; Requena, Guillermo

doi:10.1016/j.msea.2013.12.093

Cited by 32 publications

(18 citation statements)

References 25 publications

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“…Experimentally, Sebaie et al [46] observed that during solution treatment at 495 °C and 540 °C, the eutectic Si strip has experienced the shape perturbations, including the fragmentation into small segments, and then spheroidization in Al-Si alloys. Gutiérrez et al [47] reported the similar spheroidizing process in the eutectic Si phase during solution treatment at 480 °C. For Al3(Er,Cu,Fe)(Ni, Si)2 phases, they have been kept stable during T6 heat treatments according to the XRD analysis (Fig.…”

Section: Resultsmentioning

confidence: 84%

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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Section: Resultsmentioning

confidence: 84%

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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“…However, researches on the Al-based composites suggested that heat treatment may influence the creep performance, mainly, in two ways: (a) The formation of fine precipitates, leading to a strong interaction between the precipitated phases and dislocations [44,48]; (b) the variation of microstructure, such as dissolution of intermetallics; or an evolution of morphology, leading to a difference in load bearing capability. Fernández-Gutiérrez and co-workers [24] investigated the high temperature creep behavior of a cast Al12SiCuMgNi piston alloy under different heat treatment. They indicated that the skeleton structure began to collapse and load transfer tended to lose as the solution heat treatment time increased.…”

Section: The Influence Of Heat Treatment On the Creep Behaviormentioning

confidence: 99%

“…Nevertheless, a distinct spheroidization has been shown in Figure 2c (T7 state), as compared to Figure 2b (T5 state). On the one hand, the disintegration of Si network can reduce the load bearing capability in materials [1,24,31]. Besides this, TiB 2 particles can restrict the growth of eutectic Si and further change its morphology.…”

Section: The Influence Of Heat Treatment On the Creep Behaviormentioning

confidence: 99%

“…Requena et al [14] has showed the considerably lower creep resistance of 22 vol.% Al 2 O 3 /AA6061 composites compared with that of the unreinforced matrix. The role played by particulate reinforcement, especially in nano-scale size, during creep is still not well understood.Furthermore, little attention has been paid to the influence that heat treatment may have on the creep strength of the composite, although the work on the Al12SiCuMgNi alloy [24] has suggested that heat treatment affected the creep resistance of the material directly. Besides, the major creep researches are conducted on the DRAMCs, which are typically fabricated by powder metallurgy (PM).…”

mentioning

confidence: 99%

“…Furthermore, little attention has been paid to the influence that heat treatment may have on the creep strength of the composite, although the work on the Al12SiCuMgNi alloy [24] has suggested that heat treatment affected the creep resistance of the material directly. Besides, the major creep researches are conducted on the DRAMCs, which are typically fabricated by powder metallurgy (PM).…”

mentioning

confidence: 99%

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The High-Temperature Creep Behavior of In-Situ TiB2 Particulate Reinforced Al12Si4Cu2NiMg Composite

Dai

Bian

Wang

et al. 2018

Metals

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In the present work, the in-situ TiB 2 /Al12Si4Cu2NiMg (denoted as 'Al-12Si') composites were successful synthesized through the salt-metal reaction route. The influences of weight fraction (0, 4, and 9 wt.%) and heat treatment (T5 and T7) on the tensile creep deformation were studied at ≥623 K under constant load in air. At the investigated temperature and stress condition, TiB 2 particles increased creep deformation resistance, as compared to the unreinforced alloy, while the composites presented similar strength when the weight fraction of reinforcement increased from 4% to 9%. It was found that the steady-state creep rate was lower in the 4 wt.% TiB 2 /Al-12Si composite (T5), as compared with that in the 4 wt.% TiB 2 /Al-12Si composite (T7). The result has been rationalized by using the load-partitioning model and relative to the evolution of the rigid phase. The creep deformation of the 4 wt.% TiB 2 /Al-12Si composite was controlled by the climb of dislocations in the aluminum alloy matrix.2 of 16 sources [22,23]. Requena et al. [14] has showed the considerably lower creep resistance of 22 vol.% Al 2 O 3 /AA6061 composites compared with that of the unreinforced matrix. The role played by particulate reinforcement, especially in nano-scale size, during creep is still not well understood.Furthermore, little attention has been paid to the influence that heat treatment may have on the creep strength of the composite, although the work on the Al12SiCuMgNi alloy [24] has suggested that heat treatment affected the creep resistance of the material directly. Besides, the major creep researches are conducted on the DRAMCs, which are typically fabricated by powder metallurgy (PM). The PM processed DRAMCs have always shown higher creep resistance and more regular experimental data compared to the ingot metallurgy (IM) method [13,25]. However, the IM process is widely used and continuously developed due to its ability to achieve high part volumes and tight part tolerances at lower cost in the industrial application [26]. The study of creep behavior for the IM DRAMCs has been largely neglected by the academia.The present study is aiming to understand the steady state creep behavior and fracture mechanism of in-situ TiB 2 /Al12Si4Cu2NiMg composite produced by the IM strategy. The study consists of two sections. In Section 1, the similarities and differences in the creep behaviors between composites and the alloy as well as the relevant creep mechanisms, such as the role of the particle reinforcement, are identified and discussed. In Section 2, the analysis, based on the concept of load transfer, has been proposed to describe the creep behavior of the composite at different heat-treated states. Materials and Methods MaterialsIn this work, an Al12Si4Cu2NiMg alloy (hereafter denoted as 'Al-12Si alloy') and two Al-12Si alloy matrix composites reinforced with 4 wt.% and 9 wt.% of particulate TiB 2 were used. The nominal chemical composition of the Al-12Si alloy is given in Table 1.

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Enhancement of Elevated‐Temperature Strength in Al–Cu–Ce–Mn–Zr Cast Aluminum Alloy Through Ni Alloying

et al. 2023

Adv Eng Mater

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Herein, to enhance the elevated‐temperature strength of heat‐resistant aluminum alloys to satisfy application requirements, the effect of Ni content (0.5, 1.0, 2.0, 4.0 wt%) on the microstructures and tensile properties of Al–8.4Cu–2.3Ce–1.0Mn–0.2Zr alloy is investigated. The metallographic analysis techniques are used to quantitatively examine the microstructural changes. The skeleton‐like Al7Cu4Ni phase is formed after the addition of Ni and its morphology is gradually transformed into a coarse reticular‐like shape with Ni content increasing. However, the thermally stable Al8CeCu4 and Al24MnCu8Ce3 phases disappear when Ni content exceeds 1.0%. Al–8.4Cu–2.3Ce–1.0Mn–0.2Zr–0.5Ni alloy exhibits the optimal elevated‐temperature tensile performance at 400 °C, and its ultimate tensile strength, yield strength, and elongation at 400 °C reach 105, 85 MPa, and 16.5%, respectively. The optimal tensile performance is attributed to synergistic enhancing action of the thermostable Al8CeCu4, Al24MnCu8Ce3, Al16Cu4Mn2Ce, and Al7Cu4Ni phases at the grain boundaries and the nano‐sized Al20Cu2Mn3 and Al2Cu precipitates inside the grains. The typical brittle fracture is dominating in the five alloys with different Ni contents at ambient temperature, but the fracture mode at 400 °C is changed from ductile fracture to ductile and brittle mixed fracture with the increase of Ni.

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The effect of spheroidisation heat treatment on the creep resistance of a cast AlSi12CuMgNi piston alloy

Cited by 32 publications

References 25 publications

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

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

The High-Temperature Creep Behavior of In-Situ TiB2 Particulate Reinforced Al12Si4Cu2NiMg Composite

Enhancement of Elevated‐Temperature Strength in Al–Cu–Ce–Mn–Zr Cast Aluminum Alloy Through Ni Alloying

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