A short review on mechanical properties of SLM titanium alloys based on recent research works

Rahulan, N.; Sharma, Sreekala S.; Rakesh, Nitin; Sambhu, R.

doi:10.1016/j.matpr.2022.04.310

Cited by 15 publications

(16 citation statements)

References 38 publications

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“…The results show that the cutting force of the additively manufactured titanium alloys was slightly larger than that of traditional cast materials. This was mainly attributed to the higher yield strength of the SLM titanium alloys than conventional materials [ 29 ].…”

Section: Resultsmentioning

confidence: 99%

Research on the Cutting Force and Serrated Chips in Ultra-Precision Micro-Grooving of SLM Ti6Al4V Alloy

et al. 2023

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Selective laser melting (SLM) has significant advantages in the near net shape manufacturing of metal parts with complex geometries. However, SLM parts usually have problems such as poor surface quality and low dimensional accuracy, which require post-processing. This paper focuses on the research around the influence of ultra-precision micro-grooving the SLM Ti6Al4V alloy on the cutting force and serrated chips. The influence of the processing parameters on the cutting force and surface processing quality was analyzed in detail, and the cutting simulation model of the SLM Ti6Al4V alloy was established. The formation process of the serrated chip was successfully simulated, and the experiments verified the reliability of the established model. The research results show that the dynamic cutting force and surface processing quality are mainly related to the depth of cut, and the two trends are consistent. It is also shown that the serrated chip begins on the free surface of the workpiece and propagates deeply in the shear zone, forming a shear band, and its serrated nodules move upward and forward to form periodic serrated chips.

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Section: Resultsmentioning

confidence: 99%

Research on the Cutting Force and Serrated Chips in Ultra-Precision Micro-Grooving of SLM Ti6Al4V Alloy

et al. 2023

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“…[112] Although α 0 martensite is detrimental to ductility, it plays a positive role in microhardness, [92] and the microhardness of SLM Ti6Al4V alloy can reach 380-420 HV, while the counterpart produced by casting or forging is only 280-340 HV. [113] As mentioned earlier, SLM Ti and its alloy implants are characterized by a unique microstructure and possess more excellent comprehensive mechanical properties than casting and forging implants. However, the unmelted powder particles inevitably adhere to the surfaces of SLM Ti and its alloy implants, especially for porous structures, resulting in excessive surface roughness, typically in the range of 5-40 μm, [114] and it can lead to a health hazard as the residual powder particles are dislodged from the implant surface and circulated into the body fluid.…”

Section: Slm Ti and Its Alloysmentioning

confidence: 96%

“…[ 112 ] Although α′ martensite is detrimental to ductility, it plays a positive role in microhardness, [ 92 ] and the microhardness of SLM Ti6Al4V alloy can reach 380–420 HV, while the counterpart produced by casting or forging is only 280–340 HV. [ 113 ]…”

Section: Slm Ti and Its Alloysmentioning

confidence: 99%

Surface Modification of Porous Titanium and Titanium Alloy Implants Manufactured by Selective Laser Melting: A Review

Liu,

Li,

Wang

et al. 2023

Adv Eng Mater

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Titanium (Ti) and its alloy implants with porous structure manufactured by selective laser melting (SLM) can match elastic modulus of human bone to reduce the stress‐shielding effect and satisfy the personalized requirement in orthopedic surgery. Compared with conventional casting and forging Ti and its alloy implants, SLM implants possess unique microstructural features and excellent comprehensive mechanical properties. However, the un‐melted powder particles inevitably adhere to the surfaces of SLM implants, which may result in excessive surface roughness and potential health risks. Moreover, there are significant issues encountered, such as bioactivity, toxicity, antibacterial activity, corrosion and wear resistance. Consequently, surface modification methods are essential to remove the un‐melted powder particles and improve biological and mechanical properties of SLM implants. Herein, the research efforts focus exclusively on chemical (acid treatment, alkali treatment, sol‐gel, chemical vapor deposition and atomic layer deposition) and electrochemical methods (anodization and microarc oxidation) for SLM Ti and its alloy implants, especially for porous structures. Particularly, the characteristics of these methods are summarized, and their commonly used pre‐ and post‐treatment methods are introduced. In addition, the development trends and challenges in surface modification of SLM Ti and its alloy implants are discussed.This article is protected by copyright. All rights reserved.

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“…However, at a specific temperature known as the transus temperature, a transformation occurs, converting the alloy into the β phase with a body-centered cubic (BCC) structure. [2,3] The combination of these two phases imparts several unique properties to the alloy, including excellent strength and fracture toughness. Despite these promising properties, the production of components using titanium alloys presents several challenges.…”

Section: Introductionmentioning

confidence: 99%

“…[11,12] Nevertheless, parts produced using the SLM method exhibit higher specific strength and hardness compared to those fabricated through conventional methods. [2,4,5,13] Consequently, several studies have focused on comparing the mechanical properties of SLMed products with parts produced through traditional processes such as casting and forging. [14][15][16] In contrast, it is well documented that the as-built microstructure and performance of components differ between the EBM and SLM processes due to their inherent process variations.…”

Section: Introductionmentioning

confidence: 99%

Comparing the Cold, Warm, and Hot Deformation Flow Behavior of Selective Laser‐Melted and Electron‐Beam‐Melted Ti–6Al–2Sn–4Zr–2Mo Alloy

Roshani,

Abedi,

Saboori

2023

Adv Eng Mater

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The cold, warm, and hot deformation flow behavior and mechanical properties of the Ti‐6242 alloy produced by selective laser melting (SLM) and electron beam melting (EBM) are compared. Hot compression tests are conducted over a wide temperature range (100–1000 °C) at a constant strain rate of 0.001 s−1. The yield and overall strength levels of the SLMed specimens are higher than those of the EBMed specimens at all temperatures. A thermally stable region is observed for SLMed specimens in the temperature range of 100–700 °C, but the strength level drops significantly (approximately 300–500 MPa) at above 700 °C. The stability region shifts to the lower temperature range of 100–600°Cfor the EBMed specimens, and strength starts to decrease at 600 °C. Both specimens experience fracture in a cold‐temperature regime but exhibit a high strain tolerance of approximately 0.4. The SLMed samples display a completely brittle behavior at a warm temperature regime, whereas, the EBMed specimens demonstrate better formability, tolerating higher compressive strains. The softening fraction substantially increases at high temperatures, indicating safe domains for thermomechanical processing of additively manufactured Ti6242 alloy.

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A short review on mechanical properties of SLM titanium alloys based on recent research works

Cited by 15 publications

References 38 publications

Research on the Cutting Force and Serrated Chips in Ultra-Precision Micro-Grooving of SLM Ti6Al4V Alloy

Research on the Cutting Force and Serrated Chips in Ultra-Precision Micro-Grooving of SLM Ti6Al4V Alloy

Surface Modification of Porous Titanium and Titanium Alloy Implants Manufactured by Selective Laser Melting: A Review

Comparing the Cold, Warm, and Hot Deformation Flow Behavior of Selective Laser‐Melted and Electron‐Beam‐Melted Ti–6Al–2Sn–4Zr–2Mo Alloy

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