Hot isostatic pressing (HIP) to achieve isotropic microstructure and retain as-built strength in an additive manufacturing titanium alloy (Ti-6Al-4V)

Benzing, Jake T.; Hrabe, Nikolas; Quinn, Tim; White, Ryan M.; Rentz, Ross A.; Ahlfors, Magnus

doi:10.1016/j.matlet.2019.126690

Cited by 77 publications

(20 citation statements)

References 10 publications

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“…Heat treatments (HTs) are solved problems of structural and phase inhomogeneity, residual stresses, and anisotropy. Hot isostatic pressing (HIP) of deposited samples allows the removal of defects, such as pores and non-fusion [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Features of Heat Treatment the Ti-6Al-4V GTD Blades Manufactured by DLD Additive Technology

et al. 2021

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Additive manufacturing of titanium alloys is one of the fastest growing areas of 3D metal printing. The use of AM methods for parts production in the aviation industry is especially promising. During the deposition of products with differently sized cross-sections, the thermal history changes, which leads to non-uniformity of the structure and properties. Such heterogeneity can lead to failure of the product during operation. The structure of deposited parts, depending on the thermal cycle, may consist of α’, α + α’ + β’, and α + β in different ratios. This problem can be solved by using heat treatment (HT). This paper presents research aimed towards the determination of optimal heat treatment parameters that allows the reception of the uniform formation of properties in the after-treatment state, regardless of the initial structure and properties, using the example of a deposited Ti-6Al-4V gas turbine blade.

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Section: Introductionmentioning

confidence: 99%

Features of Heat Treatment the Ti-6Al-4V GTD Blades Manufactured by DLD Additive Technology

et al. 2021

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“…Casting and milling methods, which were the simplest manufacturing processes in the early days, are unsuitable for making homogeneous and fine pores in the internal structure of titanium [ 6 ]. To overcome such process limitations, various methods for manufacturing porous titanium have been studied, including hot isostatic pressing [ 17 ], metal injection molding [ 18 ], spark plasma sintering [ 19 ], space holder technique [ 20 ], plasma spraying [ 21 ], anodic dissolution [ 22 ] and powder metallurgy [ 23 ]. However, some techniques can produce only cavities and not interconnected pores.…”

Section: Discussionmentioning

confidence: 99%

Bone Conduction Capacity of Highly Porous 3D-Printed Titanium Scaffolds Based on Different Pore Designs

Lim

Ryu²,

Woo³

et al. 2021

Materials

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In porous titanium scaffolds manufactured via 3D printing, the differences in bone formation according to pore design and implantation period were studied. Titanium scaffolds with three types of different pore structures (Octadense, Gyroid, and Dode) were fabricated via 3D printing using the selective laser melting method. Mechanical properties of scaffolds were investigated. Prepared specimens were inserted into both femurs of nine rabbits and their clinical characteristics were observed. Three animals were sacrificed at the 2nd, 4th, and 6th weeks, and the differences in bone formation were radiologically and histologically analyzed. The percentage of new bone and surface density in the pore structure were observed to be approximately 25% and 8 mm2/mm3, respectively. There was no difference in the amount of newly formed bone according to the pore design at 2, 4, and 6 weeks. In addition, no differences in the amount of newly formed bone were observed with increasing time within the same pore design for all three designs. During the 6-week observation period, the proportion of new bones in the 3D-printed titanium scaffold was approximately 25%. Differences in bone formation according to the pore design or implantation period were not observed.

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“…This is definitely seen to be beneficial and the accepted practice for cast and wrought alloys. However, for materials processed using AM, the benefits tend to be less definitive and have in certain cases been found to have a somewhat limited effect [126][127][128][129][130][131][132][133][134][135][136][137][138].…”

Section: Hot Isostatic Pressing and Heat Treatmentmentioning

confidence: 99%

Challenges in Qualifying Additive Manufacturing for Turbine Components: A Review

Srinivasan

2021

Trans Indian Inst Met

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Gas turbine engine advancements have been enabled by innovation in materials and manufacturing technologies. The evolution of additive manufacturing (AM) has changed the face of direct digital technologies for the rapid production of models, prototypes, and functional parts including repair and maintenance for turbine engines. Metal 3D printing is poised to be an enabler for the next industrial revolution in enabling advancements in turbine engine performance. While there has been tremendous efforts on research and development in utilizing this versatile technology, the number of qualified metallic parts that are running in the engine has not been commensurate with the applied research and development efforts and the benefits that the AM technology offers. This review addresses some of the key technical issues that are currently limiting the prolific usage of AM as a successful vehicle for accelerated progress in gas turbine engines.

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Hot isostatic pressing (HIP) to achieve isotropic microstructure and retain as-built strength in an additive manufacturing titanium alloy (Ti-6Al-4V)

Cited by 77 publications

References 10 publications

Features of Heat Treatment the Ti-6Al-4V GTD Blades Manufactured by DLD Additive Technology

Features of Heat Treatment the Ti-6Al-4V GTD Blades Manufactured by DLD Additive Technology

Bone Conduction Capacity of Highly Porous 3D-Printed Titanium Scaffolds Based on Different Pore Designs

Challenges in Qualifying Additive Manufacturing for Turbine Components: A Review

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