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Article

A New Approach to Determine Tensile Stress-Strain Evolution in Semi-Solid State at Near-Solidus Temperature of Aluminum Alloys

1
Department of Applied Science, University of Quebec at Chicoutimi, Saguenay, QC G7H 2B1, Canada
2
Department of Mining, Metallurgy and Materials Engineering, Laval University, Québec, QC G1V 0A6, Canada
3
Arvida Research and Development Centre, Rio Tinto Aluminum, Saguenay, QC G7S 4K8, Canada
*
Author to whom correspondence should be addressed.
Academic Editor: Elisabetta Gariboldi
Metals 2021, 11(3), 396; https://doi.org/10.3390/met11030396
Received: 29 January 2021 / Revised: 13 February 2021 / Accepted: 22 February 2021 / Published: 28 February 2021
Accurate determination of the materials’ strength and ductility in the semi-solid state at near-solidus temperatures is essential, but it remains a challenging task. This study aimed to develop a new method to determine the stress-strain evolution in the semi-solid state of aluminum alloys within the Gleeble 3800 unit. Stress evolution was determined by the newly developed “L-gauge” method, which converted the displacement of the “restrained” jaw, measured using an L-gauge, into the force. This method gives the possibility to determine the flow stress more accurately, especially for the very low stress rang (1–10 MPa) in the semi-solid state at near-solidus temperatures. The digital image correlation technique implemented in the Gleeble unit allowed effective measurement of the heterogeneous strain fields evolving within the specimen under tensile loading. Therefore, the stress-strain curves measured in the semi-solid state help to better understand the alloy’s susceptibility to hot tearing. The results of an AA6111 alloy under different liquid fractions (2.8% at 535 °C and 5.8% at 571 °C) were demonstrated. The reliable stress-strain data and heterogenous strain distribution are beneficial to develop the thermomechanical models and hot-tearing criteria. View Full-Text
Keywords: aluminum alloys; semi-solid; high-temperature tensile properties; digital image correlation aluminum alloys; semi-solid; high-temperature tensile properties; digital image correlation
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MDPI and ACS Style

Rakhmonov, J.; Qassem, M.; Larouche, D.; Liu, K.; Javidani, M.; Colbert, J.; Chen, X.-G. A New Approach to Determine Tensile Stress-Strain Evolution in Semi-Solid State at Near-Solidus Temperature of Aluminum Alloys. Metals 2021, 11, 396. https://doi.org/10.3390/met11030396

AMA Style

Rakhmonov J, Qassem M, Larouche D, Liu K, Javidani M, Colbert J, Chen X-G. A New Approach to Determine Tensile Stress-Strain Evolution in Semi-Solid State at Near-Solidus Temperature of Aluminum Alloys. Metals. 2021; 11(3):396. https://doi.org/10.3390/met11030396

Chicago/Turabian Style

Rakhmonov, Jovid, Mohamed Qassem, Daniel Larouche, Kun Liu, Mousa Javidani, Josée Colbert, and X.-Grant Chen. 2021. "A New Approach to Determine Tensile Stress-Strain Evolution in Semi-Solid State at Near-Solidus Temperature of Aluminum Alloys" Metals 11, no. 3: 396. https://doi.org/10.3390/met11030396

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