A strategy to introduce gradient equiaxed grains into Zr sheet by combining laser surface treatment, rolling and annealing

Chai, Linjiang; Zhu, Yufan; Hu, Xing; Murty, K. Linga; Guo, Ning; Chen, Liang‐Yu; Ma, Yuanyuan; Zhang, Lai-Chang

doi:10.1016/j.scriptamat.2021.113761

Cited by 13 publications

(5 citation statements)

References 31 publications

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“…Laser surface treatment (LST) is recently one of the most popular methods of heat treatment, since LST effectively improves surface performance and prolongs the service life of parts [4][5][6][7][8] . LST without added materials encompasses laser surface quenching (LSQ) and laser surface melting (LSM) techniques [4] .…”

Section: Introductionmentioning

confidence: 99%

A prediction approach of fiber laser surface treatment using ensemble of metamodels considering energy consumption and processing quality

Wu¹,

Zhang²,

Jiang³

et al. 2022

Green Manuf Open

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Laser surface treatment (LST) is essential for advanced manufacturing but is extremely energy intensive. Being energy-aware is imperative as the industry pays increasing attention to energy management and environmental protection. However, existing literature mainly focuses on the laser-material interaction in LST, while few studies have considered energy consumption when investigating the processing quality. In this article, three metamodels (Kriging, RBF, and SVR) are integrated into an ensemble of metamodels (EM) by suitable weight coefficients, and the EM incorporates the predictive advantages of different metamodels. The EM establishes the relationship between laser process parameters (laser power, scan speed, and defocusing amount) and three outputs (total energy consumption, surface roughness, and depth-width ratio of LST track). The effectiveness of the presented prediction approach is validated by the leave-one-out method and additional experiments. Furthermore, the main influences of process parameters on the three outputs are studied. According to the technique for order preference by similarity to an ideal solution (TOPSIS), the optimal process parameter is Group No. 2, with the relative closeness of 78.04%, while the worst one is Group No. 13, with the relative closeness of 2.21%. The presented prediction approach can serve as a reliable foundation in the energy-aware application of laser processing.

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Section: Introductionmentioning

confidence: 99%

A prediction approach of fiber laser surface treatment using ensemble of metamodels considering energy consumption and processing quality

Wu¹,

Zhang²,

Jiang³

et al. 2022

Green Manuf Open

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“…Most researches are focused on conventional steel or titanium substrates [18][19][20]. Chai et al [21] achieved gradient equiaxed grain distribution into Zr sheet by combining laser surface treatment, rolling and annealing recently. In this work, Al 1.5 CoCrFeNi was in-situ synthesized on the surface of CrCoFeNi sheet via Al laser alloying.…”

Section: Introductionmentioning

confidence: 99%

Surface hardening of CrCoFeNi high-entropy alloys via Al laser alloying

Gou

et al. 2021

Materials Research Letters

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Undeformed face-centred cubic (FCC) high-entropy alloys (HEAs) always possess excellent plasticity but low hardness. In this work, Al alloying on the surface of a CrCoFeNi FCC HEA is realized by laser alloying technique. An Al 1.5 CoCrFeNi body-centred cubic (BCC) HEA is in-situ generated on the surface of the FCC HEA. The well-bonding BCC HEA layer possesses a hardness as high as 536 HV. The hard surface results in a much lower wear rate of the Al-alloyed specimen than the pristine specimen. This study provides a simple strategy to harden the FCC HEAs by in-situ formation of BCC HEA through laser alloying. IMPACT STATEMENTA laser alloying technology to harden CrCoFeNi FCC HEA by in-situ formation of BCC HEA.

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“…[ 7–9 ] Surface modification methods, such as chemical conversion coatings, electrochemical plating, and anodic oxidation, are frequently employed to improve the corrosion resistance of many alloys (as well as Mg alloys). [ 10–18 ] Micro‐arc oxidation (MAO) is a novel surface treatment method developed from conventional anodic oxidation. [ 19–21 ]…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9] Surface modification methods, such as chemical conversion coatings, electrochemical plating, and anodic oxidation, are frequently employed to improve the corrosion resistance of many alloys (as well as Mg alloys). [10][11][12][13][14][15][16][17][18] Micro-arc oxidation (MAO) is a novel surface treatment method developed from conventional anodic oxidation. [19][20][21] This technology is also known as anode spark deposition, micro-plasma oxidation and plasma electrolyte oxidation.…”

Section: Introductionmentioning

confidence: 99%

Growth Mechanism of Ceramic Coating on ZK60 Magnesium Alloy Based on Two‐Step Current‐Decreasing Mode of Micro‐Arc Oxidation

Wang

Zhang

et al. 2021

Adv Eng Mater

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The ZK60 deformed magnesium alloy is treated by micro‐arc oxidation (MAO) and processed in the optimized silicate–phosphate electrolyte system, which is controlled under the two‐step current‐decreasing mode. The mechanism of discharge in the MAO process is investigated using the voltage–time curve and morphology of the spark discharge at different durations. The microstructures of the coatings fabricated at different durations are investigated. The rules of the coating ingrowth and/or outgrowth, the formation mechanisms of micropores, and microcracks in the coatings are explored systematically. The corrosion resistance of the coatings is measured by electrochemical methods. Through the exploration of the mechanism, two types of micropores in the coating are summarized: the in situ discharge growth type and the pores‐sealed type, and also three types of microcracks. The results illustrate the changes of the elements on the surface of the coating and Mg, O, and Si are incorporated into the coating formation process. The specimens show the best corrosion resistance after the two‐step current‐decreasing mode treatment.

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A strategy to introduce gradient equiaxed grains into Zr sheet by combining laser surface treatment, rolling and annealing

Cited by 13 publications

References 31 publications

A prediction approach of fiber laser surface treatment using ensemble of metamodels considering energy consumption and processing quality

A prediction approach of fiber laser surface treatment using ensemble of metamodels considering energy consumption and processing quality

Surface hardening of CrCoFeNi high-entropy alloys via Al laser alloying

Growth Mechanism of Ceramic Coating on ZK60 Magnesium Alloy Based on Two‐Step Current‐Decreasing Mode of Micro‐Arc Oxidation

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