Effect of stress triaxiality and penny-shaped pores on tensile properties of laser powder bed fusion Ti-6Al-4V

Furton, Erik T.; Wilson-Heid, Alexander E.; Beese, Allison M.

doi:10.1016/j.addma.2021.102414

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…Titanium and its alloys, primarily Ti-6Al-4V, are used in a wide variety of applications ranging from use in aerospace, for their combination of the high strength and low density, to biomedical applications due to properties that promote biocompatibility (Peters et al, 2003;ASTM Standard F1108-21, 2021. In LPBF literature, Ti-6Al-4V has been extensively studied (Martin et al, 2019;Furton et al, 2021;Luo et al, 2022), which makes it an easier starting point for manufacturing multi-material components, similar to the usage of stainless steel 316L.…”

Section: Titanium Alloysmentioning

confidence: 99%

A review on experimentally observed mechanical and microstructural characteristics of interfaces in multi-material laser powder bed fusion

2023

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Additive manufacturing (AM) is a revolutionary technology. One of the key AM categories, metal powder-based fusion processes, has many advantages compared to conventional methods for fabricating structural materials, such as permitting increased geometric complexity. While single material metal powder AM has advanced significantly in the past decade, multi-material AM is gradually attracting more attention owing to the recent breakthrough in multi-material feedstock delivery and the growing interest of fabricating functionally graded components. Multi-material AM offers an alternative route for applications that require location dependent material properties and high geometrical complexity. The AM community has invented several ways to achieve compositional gradients and discrete boundaries in two and three dimensions using mechanical spreading, nozzle-based, electrophotographic, and hybrid techniques. This article reviews the current state of laser powder bed fusion based multi-material AM of metals with focuses on the characteristics of the material interface as well as the properties and performance of the AM built functionally graded materials. We show the common challenges and issues related to material transitions, such as defects, segregation, phase separation, and the efficacy of some potential solutions including material and process optimizations. Additionally, this study evaluates the applicability and limitations of the existing testing standards and methods for measuring mechanical performance of functionally graded materials. Finally, we discuss mechanical testing development opportunities, which can help multi-material AM move towards higher technological maturity. In general, we find that the link between gradient microstructure and mechanical properties is not well understood or studied and suggest several mechanical tests that may better inform this knowledge gap.

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Section: Titanium Alloysmentioning

confidence: 99%

A review on experimentally observed mechanical and microstructural characteristics of interfaces in multi-material laser powder bed fusion

2023

Self Cite

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“…The influence of each microstructural feature on the strength, ductility, hardness, fracture toughness, fatigue properties, wear resistance and corrosion behavior is meticulously addressed in the pertinent literature. The high strength [40], low weight ratio [41] and superior corrosion resistance of Ti6Al4V alloy make it suitable for a broad range of high-added-value products, from transportation and automotive industries [33] to chemical plants, oil and gas extraction, aerospace, medicine and aeronautics [31,32,[42][43][44]. Table 1 lists the relevant physicomechanical properties of Ti6Al4V alloy and compares them with the properties of widely used materials in biomedical applications of cortical bone (i.e., CoCrMo alloys, 316 L stainless steel, and A357 aluminum alloy).…”

Section: Ti6al4v Alloymentioning

confidence: 99%

Mechanical Properties of Ti6Al4V Fabricated by Laser Powder Bed Fusion: A Review Focused on the Processing and Microstructural Parameters Influence on the Final Properties

Bartolomeu

Gasik

Silva

et al. 2022

Metals

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Ti6Al4V alloy is an ideal lightweight structural metal for a huge variety of engineering applications due to its distinguishing combination of high specific mechanical properties, excellent corrosion resistance and biocompatibility. In this review, the mechanical properties of selective laser-melted Ti6Al4V parts are addressed in detail, as well as the main processing and microstructural parameters that influence the final properties. Fundamental knowledge is provided by linking the microstructural features and the final mechanical properties of Ti6Al4V parts, including tensile strength, tensile strain, fatigue resistance, hardness and wear performance. A comparison between Laser Powder Bed Fusion and conventional processing routes is also addressed. The presence of defects in as-built Ti6Al4V parts and their influences on the mechanical performance are also critically discussed. The results available in the literature show that typical Laser Powder Bed–Fused Ti6Al4V tensile properties (>900 MPa yield strength and >1000 MPa tensile strength) are adequate when considering the minimum values of the standards for implants and for aerospace applications (e.g., ASTM F136–13; ASTM F1108–14; AMS4930; AMS6932).

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Crack Growth of Defects in Ti-6Al-4V Under Uniaxial Tension: Measurements and Modeling

Furton,

Beese

2023

Exp Mech

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Effect of stress triaxiality and penny-shaped pores on tensile properties of laser powder bed fusion Ti-6Al-4V

Cited by 6 publications

References 16 publications

A review on experimentally observed mechanical and microstructural characteristics of interfaces in multi-material laser powder bed fusion

A review on experimentally observed mechanical and microstructural characteristics of interfaces in multi-material laser powder bed fusion

Mechanical Properties of Ti6Al4V Fabricated by Laser Powder Bed Fusion: A Review Focused on the Processing and Microstructural Parameters Influence on the Final Properties

Crack Growth of Defects in Ti-6Al-4V Under Uniaxial Tension: Measurements and Modeling

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