Selective Laser Melting of high-strength TiB2/AlMgScZr Composites: Microstructure, tensile deformation behavior, and mechanical properties

AbstractIn order to investigate the tensile deformation behavior of ultra-high-strength-steel BR1500HS, a series of isothermal tensile experiments were carried out in a temperature range of 1023˜1123 K and a strain rate range of 0.01˜10 s

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Selective laser melting of high strength Al–Cu–Mg alloys: Processing, microstructure and mechanical properties

Materials Science and Engineering A ◽

10.1016/j.msea.2015.12.101 ◽

2016 ◽

Vol 656 ◽

pp. 47-54 ◽

Cited By ~ 161

Author(s):

Hu Zhang ◽

Haihong Zhu ◽

Ting Qi ◽

Zhiheng Hu ◽

Xiaoyan Zeng

Keyword(s):

Mechanical Properties ◽

Selective Laser Melting ◽

High Strength ◽

Mg Alloys ◽

Laser Melting ◽

Microstructure And Mechanical Properties

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Investigation of selective laser melting process for Cu-5Sn alloy on surface roughness, microstructure and mechanical property

Rapid Prototyping Journal ◽

10.1108/rpj-12-2020-0307 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Peng Yang ◽

Dingyong He ◽

Zengjie Wang ◽

Zhen Tan ◽

Hanguang Fu ◽

...

Keyword(s):

Mechanical Properties ◽

Mechanical Property ◽

Surface Roughness ◽

Selective Laser Melting ◽

High Strength ◽

Melting Process ◽

Scanning Speed ◽

Laser Melting ◽

Forming Process ◽

Content Type

Purpose In this research, the highly dense bulk Cu-5Sn alloy specimens were fabricated using selective laser melting (SLM). This study aims to establish the relationship between laser power (LP), scanning speed (SS) and hatch space (HS) with surface roughness (Ra) and density. To obtain Cu-5Sn alloy formed parts with high strength and low surface roughness. The microstructure and mechanical properties of SLMed Cu-5Sn were investigated. Design/methodology/approach The relative density (RD) was optimized using the response surface method (RSM) and analysis of variance. First, the Ra of SLMed formed specimens was studied to optimize the forming process parameters with a good surface. Then, the dense specimens were studied by ANOVA and the RSM to obtain dense specimens for mechanical property analysis. Findings Dense specimens were obtained by RSM and ANOVA. The tensile properties were compared with the casted specimens. The yield and ultimate strengths increased from 71 and 131 MPa for the cast specimens to 334 and 489 MPa for the SLMed specimens, respectively. The ductility increased significantly from 11% to 23%, due to the refined microstructure of the SLMed specimens, as well as the formation of many twin crystals. Originality/value The Ra, RD and mechanical properties of SLM specimens Cu-5Sn were systematically studied, and the influencing factors were analyzed together. This study provides a theoretical and practical example to improve the surface quality and RD.

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The Effect of Selective Laser Melting Process Parameters on the Microstructure and Mechanical Properties of Al6061 and AlSi10Mg Alloys

Materials ◽

10.3390/ma12010012 ◽

2018 ◽

Vol 12 (1) ◽

pp. 12 ◽

Cited By ~ 26

Author(s):

Ahmed Maamoun ◽

Yi Xue ◽

Mohamed Elbestawi ◽

Stephen Veldhuis

Keyword(s):

Mechanical Properties ◽

Selective Laser Melting ◽

Process Parameters ◽

High Strength ◽

Melting Process ◽

Laser Melting ◽

Influence Of Process Parameters ◽

Wide Range ◽

Powder Characteristics

Additive manufacturing (AM) offers customization of the microstructures and mechanical properties of fabricated components according to the material selected and process parameters applied. Selective laser melting (SLM) is a commonly-used technique for processing high strength aluminum alloys. The selection of SLM process parameters could control the microstructure of parts and their mechanical properties. However, the process parameters limit and defects obtained inside the as-built parts present obstacles to customized part production. This study investigates the influence of SLM process parameters on the quality of as-built Al6061 and AlSi10Mg parts according to the mutual connection between the microstructure characteristics and mechanical properties. The microstructure of both materials was characterized for different parts processed over a wide range of SLM process parameters. The optimized SLM parameters were investigated to eliminate internal microstructure defects. The behavior of the mechanical properties of parts was presented through regression models generated from the design of experiment (DOE) analysis for the results of hardness, ultimate tensile strength, and yield strength. A comparison between the results obtained and those reported in the literature is presented to illustrate the influence of process parameters, build environment, and powder characteristics on the quality of parts produced. The results obtained from this study could help to customize the part’s quality by satisfying their design requirements in addition to reducing as-built defects which, in turn, would reduce the amount of the post-processing needed.

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Tensile Deformation Behavior of Tempered Martensitic Steels Produced in CGL Lines

Materials Science Forum ◽

10.4028/www.scientific.net/msf.654-656.174 ◽

2010 ◽

Vol 654-656 ◽

pp. 174-177

Author(s):

Tae Jin Song ◽

Jai Hyun Kwak ◽

Bruno C. De Cooman

Keyword(s):

Mechanical Properties ◽

Deformation Behavior ◽

Thermal Cycle ◽

Tensile Deformation ◽

Low Carbon ◽

Martensitic Steels ◽

Microstructural Observation ◽

Cycle Simulation ◽

Tensile Deformation Behavior ◽

Friction Measurements

Thermal cycles of conventional galvanizing and galvannealing processes were applied to low carbon martensitic steels to examine the mechanical property of martensitic steels after their processing in conventional Continuous Galvanizing Lines (CGL). During the thermal cycle simulation, tempering phenomena occurred resulting in changes of microstructure and mechanical properties. In this study, the tensile deformation behavior of martensitic steels was studied in detail in order to understand the tempering phenomena occurring during their processing. It was found that, after tempering, the strain hardening ability decreased drastically and that the plastic flow became localized. An experimental analysis of this phenomenon will be presented based on TEM microstructural observation and Internal Friction measurements.

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Selective Laser Melting of Ti/cBN Composite

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.799.257 ◽

2019 ◽

Vol 799 ◽

pp. 257-262

Author(s):

Tatevik Minasyan ◽

Le Liu ◽

Sofiya Aydinyan ◽

Maksim Antonov ◽

Irina Hussainova

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

Boron Nitride ◽

Selective Laser Melting ◽

Cubic Boron Nitride ◽

High Strength ◽

Laser Melting ◽

Consolidation Process ◽

Laser Absorption ◽

Application Fields

Titanium has been evaluated in a broad range of aerospace, biomedical and sports equipment applications due to its unique combination of high mechanical strength, light weight and good biocompatibility. However, Ti implants are often subject to wear in specific areas. Therefore, the improvement of mechanical properties, such as hardness, wear resistance, bearing capability of implants is a key point to broaden the application fields of titanium. Cubic boron nitride (cBN) is a well-known superhard material possessing high chemical stability and biocompatibility. However, cBN suffers from poor machinability and sinterability. Attempts to process boron nitride by laser treatment into intricate shapes are extremely difficult, expensive and time-consuming tasks squeezing its applicability. In this work, manufacturing of Ti/cBN cellular structures and solid parts of high strength and good wear resistance by selective laser melting was performed. In Ti/cBN composite powder, the boron nitride provides the excellent mechanical properties, and titanium promotes the laser absorption improving the process of densification. The parametric study of consolidation process has been performed and the microstructural features along with mechanical properties are examined.

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