Combined Effects of Annealing and Cyclic Loading on Structural Rejuvenation and Mechanical Properties of CuZr Metallic Glass: A Molecular Dynamics Study

Anggono, Agus Dwi; Mahmoud, Mustafa Z.; Suksatan, Wanich; Chupradit, Supat; Ali, Muneam Hussein; Mustafa, Yasser Fakri; Tuama, Hussein Mhaibes; Aravindhan, Surendar

doi:10.1590/1980-5373-mr-2021-0494

Cited by 4 publications

(7 citation statements)

References 50 publications

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“…In general, the change in PE of the material indicates the stored energy in its atomic configuration 43 . Variations of PE for different values applied during the thermal-pressure treatments, are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

A molecular dynamics study on the mechanical response of thermal-pressure rejuvenated CuxZr100−x metallic glasses

Sayad,

Khanzadeh,

Alahyarizadeh

et al. 2023

Sci Rep

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A molecular dynamics study was performed on the mechanical response of thermal-pressure rejuvenated CuxZr100−x metallic glasses. The effect of temperature (50, 300, 600 K) and pressure (0–50 GPa) on the rejuvenation process and the mechanical properties of CuxZr100−x including stress–strain response, shear localization formation and elastic modulus were investigated. The thermal-pressure rejuvenation process involves transitioning the system to a higher potential energy state and a lower atomic volume, demonstrating the significant influence of pressure on rejuvenation. Our findings reveal that increasing pressure at specific temperatures and material compositions results in reduced yield stress and stress drop. They also indicate that with increasing pressure, the system undergoes a transition towards homogeneity, resulting in enhanced ductility compared to its initial amorphous state. Additionally, high temperatures contribute to lower values of Young's, shear, and bulk moduli, as well as decreased yield stress and stress drop. Consequently, the system becomes more homogeneous, promoting rejuvenation. Furthermore, we observed that the final yield strength of the system increases with higher Cu content for all structures at specific pressures and temperatures. The level of rejuvenation is additionally impacted by the amount of Cu, and structures containing varying content of Cu demonstrate varying degrees of rejuvenation. To validate our findings, we utilized Voronoi analysis, which revealed a higher fraction of densely-packed clusters in the samples. Finally, a total of 10 materials properties were calculated and explored using statistical analysis which shows there are different correlations between pressure, temperature and atomic composition with mechanical properties.

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Section: Resultsmentioning

confidence: 99%

A molecular dynamics study on the mechanical response of thermal-pressure rejuvenated CuxZr100−x metallic glasses

Sayad,

Khanzadeh,

Alahyarizadeh

et al. 2023

Sci Rep

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“…The 1 st atomic shell, dominating the short‐range order (SRO) in the range of 2.93–3.14 Å can be attributed to Zr‐Zr pairs while the left shoulder in the range of 2.75–2.93 Å is mainly attributed to Zr‐Cu pairs. [ 93–95 ]…”

Section: Resultsmentioning

confidence: 99%

“…The 1 st atomic shell, dominating the short-range order (SRO) in the range of 2.93-3.14 Å can be attributed to Zr-Zr pairs while the left shoulder in the range of 2.75-2.93 Å is mainly attributed to Zr-Cu pairs. [93][94][95] Peak position measurement based on the first PDF peak in Figure 3b1 shows a constant position for all samples except SB-L with a slight shift to the larger distances. Evaluation of full width at half maximum (FWHM) displays higher values for the feeding powder and the SB samples compared to the GB samples with SB-L showing a maximum value.…”

Section: Atomic-scalementioning

confidence: 92%

“…However, molecular dynamic (MD) modeling used for PDF analysis revealed that the intensity of the Cu-Zr pair was reduced while no changes were observed in Zr-Zr atomic pair under cyclic mechanical loading. [93] In another work, a reverse Monte-Carlo (RMC) simulation based on PDF measurement revealed a steady number of Zr-Zr pairs and a decline in the quantity of Zr-Cu pairs in the range of 2.93-3.14 Å. [115] Therefore, in our case, one can assume that Zr-Cu pairs are mostly responsible for the decrease in intensity of the major peak of the 1st shell in the range of 2.93 to 3.14 Å.…”

Section: Structural Responsementioning

confidence: 99%

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Controlling the Glassy State toward Structural and Mechanical Enhancement: Additive Manufacturing of Bulk Metallic Glass Using Advanced Laser Beam Shaping Technology

Hadibeik,

Ghasemi‐Tabasi,

Burn

et al. 2023

Adv Funct Materials

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Bulk metallic glasses (BMGs) offer exceptional physical/mechanical properties enabling them to be highly desirable for a varietyof applications. Laser powder bed fusion (LPBF) has great promise for producing large and intricate BMG structures. However, using non‐optimal energy distribution in current additive manufacturing machines leads to extensive reheating of previously solidified layers. As a result, the mechanical characteristics can be significantly impacted by structural relaxation and partial crystallization. Here, a tunable advanced laser beam shaping technology is employed to overcome the difficulties originating from non‐optimal energy distribution in current additive manufacturing machines. This study fabricates fully amorphous/dense BMG samples using the shaped laser beam and established optimized atomic‐scale short‐and medium‐range ordering along with improved yield/fracture compressive strength. Formation of a shallow and wide melting pool geometry using the beam shaping allows to increase hatching distances to better control the thermal history introducing improved amorphicity and rejuvenation. This higher rejuvenation and disordering allow for increased atomic mobility, which facilitates the creation and spread of shear bands, thus enhancing the mechanical strength and ductility of the material. The current work demonstrates that BMG parts can be fabricated using flexible beam‐shaping technology allowing to go beyond the capabilities of state‐of‐the‐art additive manufacturing techniques.

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“…The brazing process is a welding technology that is widely used in industry for joining materials in the form of pipes, sheets, or plates, both similar and dissimilar metals [1]. Brazing or soldering is conducted by using a metal filling or solder metal between the metal surfaces to be joined [2].…”

Section: Introductionmentioning

confidence: 99%

Influence of Deep Etching Surface Treatment to The Tensile Strength and Microstructure of Brazing Aluminium - Mild Steel

Anggono,

Darmawan,

Yulianto

et al. 2024

J. Phys.: Conf. Ser.

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Since hard metals are among the materials that liquid brazing alloys scarcely adhere to, they should not be brazed without first removing the surface layer after sintering. The electrolytic etching method, which gives the surfaces of materials that are hardly wettable very good energetic qualities, is given specific attention. Deep etching is done by using a high concentration of acid solution to roughen the surface. Both dry and wet settings are suitable for etching. An etching fluid is used for etching in a wet environment. Typically, the plate or metal is submerged in an etching solution, where the substance is chemically broken down. While in dry etching, the plasma’s gas phase is where the etching takes place. Due to the presence of plasma in this situation, the etching process that takes place combines chemical and physical processes. Plasma etching is another name for dry etching. Deep etching is an etching process to obtain a rougher surface. Wet deep etching requires a longer immersion time and even several immersions are required. The purpose of this study was to determine the effect of etching treatment in the brazing process of Aluminium-Mild steel for its microstructure and mechanical properties. The specimens in this study used aluminium 6000 series, mild steel, Alusol ER4043, and etching fluid. Mild steel surfaces are deep etched before brazing. Specimen manufacturing standard refers to ASTM D1002. A micro photo test was conducted to compare the surface conditions of aluminium and mild steel with and without etching treatment. The deep etching process is carried out in three variations of time, namely 20, 30, and 40 minutes. The results showed that the tensile strength increased with deep etching treatment on the surface.

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Combined Effects of Annealing and Cyclic Loading on Structural Rejuvenation and Mechanical Properties of CuZr Metallic Glass: A Molecular Dynamics Study

Cited by 4 publications

References 50 publications

A molecular dynamics study on the mechanical response of thermal-pressure rejuvenated CuxZr100−x metallic glasses

A molecular dynamics study on the mechanical response of thermal-pressure rejuvenated CuxZr100−x metallic glasses

Controlling the Glassy State toward Structural and Mechanical Enhancement: Additive Manufacturing of Bulk Metallic Glass Using Advanced Laser Beam Shaping Technology

Influence of Deep Etching Surface Treatment to The Tensile Strength and Microstructure of Brazing Aluminium - Mild Steel

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