Effect of hot isostatic pressing procedure on performance of Ti6Al4V: Surface qualities, microstructure and mechanical properties

Cai, Chao; Song, Bo; Xue, Pengju; Wei, Qingsong; Wu, Jiamin; Wei, Li; Shi, Yusheng

doi:10.1016/j.jallcom.2016.05.280

Cited by 80 publications

(27 citation statements)

References 32 publications

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“…In fact, our result is close to the Ti6Al4V alloy samples with a relative density of 96% fabricated by the pressing method reported by Villa et al [23]. Other studies have reported the use of HIP technology to manufacture completely dense parts [24]. As shown in Figure 7b, the transverse linear shrinkage of sintered samples shows a similar trend to the relative density as the temperature increases.…”

Section: Enhance Capillary Force Of Bj3dp By Mixing Fine Powdersupporting

confidence: 89%

Enhancing the Capillary Force of Binder-Jetting Printing Ti6Al4V and Mechanical Properties under High Temperature Sintering by Mixing Fine Powder

Tang

Huang

Yang

et al. 2020

Metals

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Binder jet 3D printing (BJ3DP) is an additive manufacturing technology that selectively deposits binder on powder to form a three-dimensional green body followed by sintering process. The low strength of green body and metallurgical issues limit the manufacture of Ti6Al4V parts with high-performance and that are lightweight. In this study, thermal-bubble inkjet technology was used to print Ti6Al4V parts via jetting low-concentration in-situ polymer binders. In addition, a method for mixing fine powder was used to enhance the capillary force of the powder bed and mechanical properties of the parts. The results show that the capillary force was enhanced from 8.35 kPa for pure powder to 16.27 kPa for mixed powder by mixing fine powder. The compression strength of green body was enhanced from 1.5 MPa to 3.21 MPa. After sintering, the sample with mixed powder sintered at 1420 °C for 2 h had achieved a maximum density of 95.2%, microhardness of 316 HV, and yield stress of 589 MPa. The relative density of 95.2% of Ti6Al4V parts fabricated by BJ3DP technology in our study is significantly higher than the value reported in the existing literature. Finally, the porous structure with a size of 550 μm was fabricated. Results presented demonstrate that BJ3DP can produce Ti6Al4V parts with excellent properties.

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Section: Enhance Capillary Force Of Bj3dp By Mixing Fine Powdersupporting

confidence: 89%

Enhancing the Capillary Force of Binder-Jetting Printing Ti6Al4V and Mechanical Properties under High Temperature Sintering by Mixing Fine Powder

Tang

Huang

Yang

et al. 2020

Metals

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“…Particularly, they even found that the presence of TiB network structure is beneficial for high temperature strengths [10]. This is contradictory with conventional belief that PPBs decorated by precipitates are harmful for mechanical properties of materials synthesised by powder metallurgy, especially high temperature mechanical properties such as strengths, ductility, creep rupture and fatigue [11][12][13][14][15][16][17][18][19][20][21][22]. It is obvious that for applications, more studies are required to comprehensively investigate the mechanical properties of titanium alloy composites with this kind of network structure.…”

Section: Introductionmentioning

confidence: 94%

Hot isostatic pressing of in-situ TiB/Ti-6Al-4V composites with novel reinforcement architecture, enhanced hardness and elevated tribological properties

Cai

Song

Qiu

et al. 2017

Journal of Alloys and Compounds

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In this study, titanium borides reinforced Ti-6Al-4V composites have been successfully prepared by hot isostatic pressing (HIPing). The microstructure of the as-fabricated samples was investigated using X-ray diffraction (XRD) technique, secondary electron microscopy (SEM) and electron backscatter diffraction (EBSD) and the mechanical properties evaluated through microhardness and wear resistance measurements together with nano-indentation. It was found that during HIPing the additive particles TiB2 have transformed into TiB needles which tend to decorate at prior particle boundaries of the consolidated powder particles to form a network structure. Under the same HIPing condition, the needles became increasingly coarser and agglomerated with increased addition of TiB2. Meanwhile, a large population of TiB needles have grown into the prior particle matrix, which is believed to be beneficial to the bonding between particles. The micro-hardness of the synthesised materials increased with increased volume fraction of TiB. Nano-indentation measurement demonstrates that the TiB network structure shows much higher nanohardness than the surrounding matrix regions. The friction coefficient of the synthesised composites decreased continuously with increased volume fraction of TiB, indicating improved wear resistance. High resolution transmission electron microscopy (HRTEM) analysis on wear debris revealed the formation of a series of oxides suggesting that chemical reaction between alloy elements and oxygen in air may have happened. It is thus concluded that the wearing of the current samples is a result of both friction and chemical reaction.

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“…The HIP process is commonly used for AM-produced parts just after the build. It is recommended to do a heat treatment after HIP in order to get the maximize the beneficial effect of the treatment [140][141][142]. It consists of the application of a very large pressure to the part in order to close any porosity remaining from the process.…”

Section: Hot Isostatic Pressing (Hip)mentioning

confidence: 99%

Metal additive manufacturing in the commercial aviation industry: A review

Gisario

Kazarian

Martina

et al. 2019

Journal of Manufacturing Systems

425

124

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The applications of Additive Manufacturing (AM) have been grown up rapidly in various industries in the past few decades. Among them, aerospace has been attracted more attention due to heavy investment of the principal aviation companies for developing the AM industrial applications. However, many studies have been going on to make it more versatile and safer technology and require making development in novel materials, technologies, process design, and cost efficiency. As a matter of fact, AM has a great potential to make a revolution in the global parts manufacturing and distribution while offering less complexity, lower cost, and energy consumption, and very highly customization. The current paper aims to review the last updates on AM technologies, material issues, postprocesses, and design aspects, particularly in the aviation industry. Moreover, the AM process is investigated economically including various cost models, spare part digitalization and environmental consequences. This review would be helpfully applied in both academia and industry as well.

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Effect of hot isostatic pressing procedure on performance of Ti6Al4V: Surface qualities, microstructure and mechanical properties

Cited by 80 publications

References 32 publications

Enhancing the Capillary Force of Binder-Jetting Printing Ti6Al4V and Mechanical Properties under High Temperature Sintering by Mixing Fine Powder

Enhancing the Capillary Force of Binder-Jetting Printing Ti6Al4V and Mechanical Properties under High Temperature Sintering by Mixing Fine Powder

Hot isostatic pressing of in-situ TiB/Ti-6Al-4V composites with novel reinforcement architecture, enhanced hardness and elevated tribological properties

Metal additive manufacturing in the commercial aviation industry: A review

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