Negative Shrinkage of Thin-walled Investment Brass Castings

• Autorzy: Roy Soumyajit , Pramanick A. K. , Datta P. K.

Identyfikatory

DOI

10.24425/afe.2023.144275

• Języki publikacji: EN

Abstrakty

EN

Dhokra or Dokra casting is a sophisticated cast metal craft tradition of the Indian subcontinent. It has been practiced by the countryfolk now since the Copper Age. It is a lost wax casting process in the hot clay mold. The technology is such sophisticated that it can produce up to 400 μm thin-walled hollow cast products with complicated and intricate shapes using Brass, Bronze, Copper, and other copper alloys. The investigation was for engraving Brass (2% lead) which is used by Dhokra artisans nowadays. In a field visit during dimensional analysis, one discrepancy was identified. The metal thicknesses of hollow castings are thicker than the thickness of the wax pattern. This cast metal dilation phenomenon is unusual. Shrinkage of metals compared to the pattern dimension is familiar in the casting world. The same abnormalities in the repeated investigation at different sites were observed. All the studies and experiments were organized to explain the reason hidden behind the phenomenon.

Słowa kluczowe

EN

"Dokra or Dhokra"; cast craft tradition; India; thin-walled castings; brass castings

PL

tradycyjna metoda odlewnicza; Indie; odlewy cienkościenne; odlewy mosiężne; forma odlewnicza

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2023
• Tom: Vol. 23, iss. 1
• Strony: 17--24
• Opis fizyczny: Bibliogr. 29 poz., il., rys., tab., wykr.

Twórcy

autor

Roy Soumyajit

• Dept. of Metallurgical and Material Engineering, Jadavpur University, Kolkata, India

• https://orcid.org/0000-0002-2846-5518

autor

Pramanick A. K.

• Dept. of Metallurgical and Material Engineering, Jadavpur University, Kolkata, India

autor

Datta P. K.

• Dept. of Metallurgical and Material Engineering, Jadavpur University, Kolkata, India

• https://orcid.org/0000-0001-9476-7656

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)