Precision investment casting: A state of art review and future trends

Singh, Sunpreet; Singh, Rupinder

doi:10.1177/0954405415597844

Cited by 37 publications

(26 citation statements)

References 71 publications

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“…However, it is still a great challenge to manufacture near-β titanium components for aerospace applications, which usually have complex shapes. Different approaches have been made for the manufacture of complex shaped titanium components, such as forging 3 , investment casting 4 , powder metallurgy 5 , and laser rapid prototyping 6 . Although forging is the principal shaping process for the manufacture of titanium components, it is inevitable that inhomogeneous deformation occurs during the forging process due to interface friction 7 , which results in an inhomogeneous microstructure and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of α/β Forging on Microstructure and Texture Inhomogeneity in a Ti-1023 Forged Disk

et al. 2019

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The microstructure and texture distribution of a Ti-1023 forged disk were investigated by scanning electron microscopy and synchrotron-based high-energy X-ray diffraction. The finite element method was used to simulate temperature and strain distribution in order to investigate the relationship of the α/β forging process with microstructure and texture distribution. A bimodal microstructure and rolling textures with large inhomogeneity were observed in the disk. A plate-like and a necklace-like morphology and volume fraction variations of the primary α phase were observed in different regions with different forging conditions, such as temperature, deformation, position, and high density of flow lines. Texture sharpness distribution of the β phase was in good agreement with the strain distribution, which suggests deformation may play the most important part in the texture inhomogeneity. A weak cube texture was obtained near the center of the disk, and fiber textures were found near the rim of the disk. The primary α phase also exhibited a transverse texture, which is favored by large deformation.

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Section: Introductionmentioning

confidence: 99%

Effect of α/β Forging on Microstructure and Texture Inhomogeneity in a Ti-1023 Forged Disk

et al. 2019

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“…The strength of investment casting shell mould is determined by its the modulus of rupture (MOR) [26]. There are two states of shell mould, in which the strength is crucial.…”

Section: Introductionmentioning

confidence: 99%

Shell Mould Strength of Rice Husk Ash (RHA) and Bentonite Clays in Investment Casting

Nanda

Ali

Idris

et al. 2018

International Journal on Advanced Science, Engineering and Information Technology

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Investment casting process (IC) plays a major role in the modern manufacturing process in providing an economical means of mass production components with intricate shape and complex geometry as demand in various crucial applications including aerospace, automotive, military, biomedical and others. This casting technique, develop shell mould fabrication by coating the required pattern with a refractory mixture which offers the complex geometrical shape and sizes parts to be cast. However, the modern IC approach in shell mould production suffers from zircon's cost and supply instability as it is the main material to be used. Zircon uses as refractory filler for slurry production, and also in the form of sand used as stucco particles, is favoured by the investment casting facilities and industries as it exhibits the most versatile properties such as low thermal expansion and low reactivity to the metal to be cast. During the period of zircon supply shortage, many facilities introduce several alternatives. Currently, the step taken to reduce the cost of primary slurry material is by using some alternate refractory material like, alumina, silica, to be used with zircon for shell mould production. In relation to that, several researches continue to search for alternatives approach for shell mould materials. This research introduces the alternative method in fabricating investment casting shell mould as recognized from investment casting industry located in Sungai Puar of Bukittingi Padang Indonesia. This industry employs several local resources to fabricate the shell mould. These materials consist of rice husk ash (RHA), and two types of bentonite clays. The bentonite clays were obtained nearly from Kota Payakumbuh in the western provinces. However, this industry suffers from weak shell mould strength and need to be investigated and consulted. In this paper, the investigation on shell mould strength made from rice husk ash (RHA), and bentonite clays were conducted. The strength was measured by its modulus of rupture (MOR) performed in 3 points flexural bending test. The green and fired shell mould strength was determined from five type of slurry composition. The results revealed that the highest green and fired strength obtained were 0.157 MPa and 0.361 MPa from shell mould sample C of RHA (46%) and bentonite (54%) of its composition.

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“…In article [1], Singh, S. & Singh examined in detail the areas of application of additive technologies for the castings manufacture for various purposes. In study [2,3], D.L.…”

Section: Introductionmentioning

confidence: 99%

Study of abrasive resistance of foundries models obtained with use of additive technology

Ol'khovik

2017

IOP Conf. Ser.: Earth Environ. Sci.

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The application of additive technologies in creation a medical simulator-trainer of the human head operating field L N Kashapov, N F Kashapov, R N Kashapov et al. -The method of manufacture of nylon dental partially removable prosthesis using additive technologies R N Kashapov, A I Korobkina, E V Platonov et al. Abstract. A problem of determination of resistance of the foundry models and patterns from ABS (PLA) plastic, obtained by the method of 3D printing with using FDM additive technology, to abrasive wear and resistance in the environment of foundry sand mould is considered in the present study. The description of a technique and equipment for tests of castings models and patterns for wear is provided in the article. The manufacturing techniques of models with the use of the 3D printer (additive technology) are described. The scheme with vibration load was applied to samples tests. For the most qualitative research of influence of sandy mix on plastic, models in real conditions of abrasive wear have been organized. The results also examined the application of acrylic paintwork to the plastic model and a twocomponent coating. The practical offers and recommendation on production of master models with the use of FDM technology allowing one to reach indicators of durability, exceeding 2000 cycles of moulding in foundry sand mix, are described.

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Precision investment casting: A state of art review and future trends

Cited by 37 publications

References 71 publications

Effect of α/β Forging on Microstructure and Texture Inhomogeneity in a Ti-1023 Forged Disk

Effect of α/β Forging on Microstructure and Texture Inhomogeneity in a Ti-1023 Forged Disk

Shell Mould Strength of Rice Husk Ash (RHA) and Bentonite Clays in Investment Casting

Study of abrasive resistance of foundries models obtained with use of additive technology

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