The strengthening of weight heavy alloys during heat treatment

• Autorzy: Kaczorowski M. , Skoczylas P. , Krzyńska A. , Kaniewski J.
• Języki publikacji: EN

Abstrakty

EN

The results of studies of W-Ni-Co-Fe experimental alloy, with chemical composition assuring a possibility of producing Ni-based supersaturated solid solution are presented. The alloy was prepared from tungsten, nickel, cobalt and iron powders which were first mixed then melted in a ceramic crucible where they slowly solidified in hydrogen atmosphere. Next specimens were cut from the casting and heated at a temperature 950oC. After solution treatment the specimens were water quenched and then aged for 20 h at a temperature 300oC. The specimens were subjected to microhardness measurements and structure investigations. The latter included both conventional metallography and SEM observations. Moreover, for some specimens X-ray diffractometry studies and TEM investigations were conducted. It was concluded that quenching lead to an increase of tungsten concentration in nickel matrix which was confirmed by Ni lattice parameter increase. Aging of supersaturated solid solution caused strengthening of the Ni-based matrix, which was proved by hardness measurements. The TEM observation did not yield explicit proofs that the precipitation process could be responsible for strengthening of the alloy.

Słowa kluczowe

EN

precipitation hardening; weight heavy alloys (WHA); mechanical properties; structure

PL

utwardzanie wydzieleniowe; wolframowy stop ciężki; właściwości mechaniczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2012
• Tom: Vol. 12, iss. 4
• Strony: 75--80
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., wykr.

Twórcy

autor

Kaczorowski M.

autor

Skoczylas P.

autor

Krzyńska A.

autor

Kaniewski J.

• Institute of Mechanics and Printing, Faculty of Production Engineering, Warsaw University of Technology, ul. Narbutta 85, 02-524 Warszawa, Poland,

Bibliografia

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