Dynamic compressive behaviour of selective laser melted AlSi12 alloy: Effect of elevated temperature and heat treatment

Ponnusamy, P.; Masood, Syed H.; Ruan, Dong; Palanisamy, Suresh; Rashid, Rizwan Abdul Rahman; Mukhlis, Reiza; Edwards, Nathan J.

doi:10.1016/j.addma.2020.101614

Cited by 15 publications

(4 citation statements)

References 45 publications

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“…3 Change in porosity of AlSi12 alloy processed from one powder batch, changing the point distance (PD) and exposure time (ET) [6] was greater for dynamic loading than for quasi-static loading. The same parameters were utilized in the work by Ponnusamy et al [21], and a post-treatment of annealing for 3 h at 200 °C and 400 °C was performed. On the contrary, a reduction in flow stress was observed because of thermal softening occurring in printed samples that are exposed to high temperatures.…”

Section: Tensile and Compressive Strengthmentioning

confidence: 99%

A review on factors influencing mechanical properties of AlSi12 alloy processed by selective laser melting

Kekana

Shongwe

Mpofu

et al. 2022

Int J Adv Manuf Technol

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AlSi12 has a high strength-to-weight ratio and good corrosion resistance properties. As a result, it has potential for use in the automotive and aerospace industries. However, AlSi12 is difficult to process using conventional manufacturing technologies because of its characteristics of having high thermal conductivity and reflectivity and flowability is low. It is necessary to explore how emerging manufacturing technologies can be used to effectively process it. Additive manufacturing (AM) offers great design freedom. For the AM of metallic parts, several technologies are in use, including selective laser melting (SLM), electron beam melting, laser engineered net shaping, and cold spray additive manufacturing. Among these AM processes, SLM technology is a cutting-edge manufacturing technique that has the potential to change the way people think about design and production. SLM of AlSi12 alloy presents unique advantages in producing components with high strength and low weight while having increased design freedom. However, there is a need for more information on how SLM can be effectively used to manufacture AlSi12 parts in a way that reduces defects without compromising the mechanical properties. Thus, this paper aims to review the factors that influence the mechanical properties of AlSi12 alloy printed parts produced using SLM. This information is useful in determining the factors that can be considered for manufacturing parts with outstanding characteristics.

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Section: Tensile and Compressive Strengthmentioning

confidence: 99%

A review on factors influencing mechanical properties of AlSi12 alloy processed by selective laser melting

Kekana

Shongwe

Mpofu

et al. 2022

Int J Adv Manuf Technol

View full text Add to dashboard Cite

show abstract

“…A synchronically assembled furnace was designed to heat the sample while keeping the SHPB bars The experiments were performed as follows: (1) Firstly, the samples were mounted with a thermocouple sleeve and heated at a speed of 2 o C/min to the predetermined temperature followed by 5 min to achieve a uniform temperature distribution in the samples; (2) Secondly, the bars were brought into contact with the sample, and then the strike bar was fired. A similar method was also used in other high-temperature SHPB test [34]. The incident, transmitter and reflection strain waves (εI, εT and εR) were detected by the strain gauges.…”

Section: Dynamic Test Under Elevated Temperaturesmentioning

confidence: 99%

Combined effects of elevated temperatures and high strain rates on compressive performance of S30408 austenitic stainless steel

Wang

Zhao

et al. 2021

Structures

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“…The results show that the specific wear rate of SLM Al-Cu-Mg-Si alloy after T6 heat treatment is lower, but the average friction coefficient is similar to that of Al2024 alloy after heat treatment. P. Ponnusamy et al [ 16 ] investigate the dynamic behavior of SLM-processed and heat-treated eutectic AlSi12 alloy under compression. The results showed that a significant reduction in dynamic yield strength and ultimate compressive strength was observed when the as-built AlSi12 samples were tested at elevated temperatures (200 °C and 400 °C).…”

Section: Introductionmentioning

confidence: 99%

The Effects of Heat Treatment on Microstructure and Mechanical Properties of Selective Laser Melting 6061 Aluminum Alloy

Liu

Huang

et al. 2022

Micromachines

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Selective laser melting technology can be used for forming curved panels of 6061 aluminum alloy thermal shield devices for the International Thermonuclear Experimental Reactor (ITER), in order to make the formed parts with better performance. This study proposes different heat treatment processes, including annealed treatment at 300 °C for 2 h, solution treatment at 535 °C and then aging at 175 °C over 2 h, to control the mechanical behavior of the 6061 aluminum alloy samples prepared by selective laser melting (SLM). The mechanical properties such as ductility, tensile strength, and hardness of SLM 6061 aluminum alloy were investigated, and the microstructure of the samples was analyzed. The eutectic silicon skeleton shape disappeared after annealing treatment at 300 °C for 2 h. The tensile strength decreased by 22.86% (from 315 MPa to 243 MPa of the deposited state samples), and the elongation increased from 2.01% to 6.89%. Moreover, the hardness reduced from 120.07 HV0.2 to 89.6 HV0.2. After solution aging, the unique microstructure of SLM disappeared. Furthermore, the precipitation of massive Si particles on the α-Al matrix increased, and a trace amount of the Mg2Si(β) phase was generated. Compared with the deposited samples, the tensile strength decreased by 12.06%, while the hardness of specimens was 118.8 HV0.2. However, the elongation showed a remarkable increase of 297% (from 2.01% to 7.97%). Therefore, solution aging can critically improve the plasticity without losing significant tensile stress in the SLM 6061 aluminum alloy. This study proposes the use of SLM 6061 aluminum alloy for the thermal shields on the ITER and provides a reference for choosing a reasonable heat-treatment method for the optimal performance of the SLM 6061 aluminum alloy.

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Dynamic compressive behaviour of selective laser melted AlSi12 alloy: Effect of elevated temperature and heat treatment

Cited by 15 publications

References 45 publications

A review on factors influencing mechanical properties of AlSi12 alloy processed by selective laser melting

A review on factors influencing mechanical properties of AlSi12 alloy processed by selective laser melting

Combined effects of elevated temperatures and high strain rates on compressive performance of S30408 austenitic stainless steel

The Effects of Heat Treatment on Microstructure and Mechanical Properties of Selective Laser Melting 6061 Aluminum Alloy

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