Improving High-Temperature Tensile and Low-Cycle Fatigue Behavior of Al-Si-Cu-Mg Alloys Through Micro-additions of Ti, V, and Zr

Shaha, S.K.; Czerwiński, F.; Kasprzak, W.; Friedman, J.; Chen, D.L.

doi:10.1007/s11661-015-2880-x

Cited by 57 publications

(31 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The tensile test samples were extracted from the cast wedge and machined according to the ASTM-E8 standard with a gauge length of 25 mm or parallel length of 32 mm [31]. A computerized United tensile testing machine was used to determine the tensile properties of both alloys at strain rates of 10 À3 s À1 at room temperature, at 200 and 300°C.…”

Section: Mechanical Testingmentioning

confidence: 99%

Microstructure and mechanical properties of Al–Si cast alloy with additions of Zr–V–Ti

et al. 2015

Self Cite

View full text Add to dashboard Cite

Section: Mechanical Testingmentioning

confidence: 99%

Microstructure and mechanical properties of Al–Si cast alloy with additions of Zr–V–Ti

et al. 2015

Self Cite

View full text Add to dashboard Cite

“…In order to improve high temperature mechanical properties of cast Al-Si-Cu-Mg alloys manufactured by commercial casting processes, such as gravity die casting, efforts have been made to modify the existing alloys with new alloying elements [14,15], which generally have limited solid-solubility at ageing temperatures for enhancing the precipitates strengthening and lowering the diffusivity in aluminium for retarding the Ostwald ripening [8,16]. Several studies have been carried out to evaluate the effect of different alloying elements such as Ni, Fe, Cr, Ti, V, Sc and Zr on high temperature mechanical properties of cast Al-Si alloys [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Those phases consisting of fine Fe and homogeneously dispersed Fe phases can potentially improve mechanical properties [32].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Zr-containing precipitates; a solution for significant improvement of high-temperature strength in Al-Si-Cu-Mg alloys

Rahimian

Amirkhanlou

Blake

et al. 2018

Materials Science and Engineering: A

View full text Add to dashboard Cite

This work aims to reveal the valuable role of Zr in cast Al-Si-Cu-Mg alloys utilised at elevated temperatures. The Al7Si2Cu0.2Zr alloy, subjected to well-tuned heat treatment process, was benchmarked against the conventional Al7Si0.5Cu alloy. Microstructural investigation showed that the main strengthening phases in the Al7Si2Cu0.2Zr alloy are θ´, Q´, Al-Si-Cu-Zr and Al-Si-Zr precipitates. Two Zr-containing precipitates (Al-Si-Cu-Zr and Al-Si-Zr) with the size of 80-200 nm are formed during solutionising at530 °C, which can be considered as the first ageing step. Other two Cu-containing precipitates (θ´and Q´) at the size of 20 nm are formed during ageing (170 °C). Nano-sized Zr-containing precipitates are mostly exhibited elliptical morphology with coherent/semi-coherent interfaces with the α-Al matrix, making them more stable at elevated temperatures. As a result, the yield strength is improved at room temperature from 261 to 291 MPa, and the ultimate tensile strength (UTS) is improved from 282 to 335 MPa for the Al7Si2Cu0.2Zr alloy, compared with the Al7Si0.5Cu alloy. Moreover, the mechanical properties are significantly improved at elevated temperatures. The yield strength and UTS at 200 °C are 177 and 186 MPa, respectively, for the Al7Si0.5Cu alloy. But these are224 and 246 MPa, respectively, for the Al7Si2Cu0.2Zr 2 alloy. The improvement of mechanical properties at elevated temperatures is mainly attributed to the refined microstructure and the precipitation of strengthening phases containing slow-diffused Zr element to retard the precipitation coarsening. Furthermore, the addition of Cu changes the precipitates from θ´ and β´´ in the Al7Si0.5Cu alloy to θ´ and Q´ in the Al7Si2Cu0.2Zr alloy which, in turn, induce a complementary effect on the improvement of mechanical properties.

show abstract

“…The UTS and the EL at 300 • C of the sample prepared in this study and the novel cast Al alloys recently reported [25][26][27][28] are summarized in Table 3. The UTS at 300 • C of the Fe-added SLM alloys was comparable to that of novel cast Al alloys, the strength of which is improved by the addition of Sr, Ti, Zr, and V. However, it should be noted that UTS at high temperatures depends on the strain rate.…”

Section: Resultsmentioning

confidence: 99%

Effect of Fe Addition on Heat-Resistant Aluminum Alloys Produced by Selective Laser Melting

Yamasaki

Okuhira

Mitsuhara

et al. 2019

Metals

View full text Add to dashboard Cite

The effect of Fe addition on the high-temperature mechanical properties of heat-resistant aluminum alloys produced by selective laser melting (SLM) was investigated in relation to the alloy microstructures. Fe is generally detrimental to the properties of cast aluminum alloys; however, we found that Fe-containing alloys produced by SLM had improved high-temperature strength and good ductility. Microstructural observations revealed that the increase in the high-temperature strength of the alloys was due to the dispersion of fine rod-shaped Fe-Si-Ni particles unique to the SLM material instead of the cell-like structure of eutectic Si.

show abstract

Improving High-Temperature Tensile and Low-Cycle Fatigue Behavior of Al-Si-Cu-Mg Alloys Through Micro-additions of Ti, V, and Zr

Cited by 57 publications

References 52 publications

Microstructure and mechanical properties of Al–Si cast alloy with additions of Zr–V–Ti

Microstructure and mechanical properties of Al–Si cast alloy with additions of Zr–V–Ti

Nanoscale Zr-containing precipitates; a solution for significant improvement of high-temperature strength in Al-Si-Cu-Mg alloys

Effect of Fe Addition on Heat-Resistant Aluminum Alloys Produced by Selective Laser Melting

Contact Info

Product

Resources

About