Publication result detail

Near-Gamma TiAl Investment Casting and its Optimization

DLOUHÝ, A., ZEMČÍK, L., VÁLEK, R.

Original Title

Near-Gamma TiAl Investment Casting and its Optimization

English Title

Near-Gamma TiAl Investment Casting and its Optimization

Type

Paper in proceedings (conference paper)

Original Abstract

Two drawbacks are associated with the Induction Skull Melting process often used in the neargamma TiAl investment casting technology: (i) a relatively small achievable superheat which could cause misruns in thin-wall castings and (ii) a high investment cost necessary to built up the melting unit. Therefore, a more common melting route based on a refractory crucible has been reconsidered to overcome both disadvantages. The paper reports on results of trial casting experiments performed using this common melting route. A preliminary metallographic study indicated that, while the cast volume is free of the contamination, which would result from the reaction between the melt and the crucible, there still are internal microcracks generated during the cast solidification and cooling. Modelling and experimental effort was spent to optimise key parameters of the process (the amount of superheat, the mould temperature and the cooling kinetics) and to improve the quality of casts.

English abstract

Two drawbacks are associated with the Induction Skull Melting process often used in the neargamma TiAl investment casting technology: (i) a relatively small achievable superheat which could cause misruns in thin-wall castings and (ii) a high investment cost necessary to built up the melting unit. Therefore, a more common melting route based on a refractory crucible has been reconsidered to overcome both disadvantages. The paper reports on results of trial casting experiments performed using this common melting route. A preliminary metallographic study indicated that, while the cast volume is free of the contamination, which would result from the reaction between the melt and the crucible, there still are internal microcracks generated during the cast solidification and cooling. Modelling and experimental effort was spent to optimise key parameters of the process (the amount of superheat, the mould temperature and the cooling kinetics) and to improve the quality of casts.

Keywords

Investment casting, optimization

Key words in English

Investment casting, optimization

Authors

DLOUHÝ, A., ZEMČÍK, L., VÁLEK, R.

Released

01.02.2004

Publisher

The Minerals, Metals + Materials Society

Location

San Diego, California, USA

ISBN

0-87339-543-3

Book

TMS 2003

Edition

1

Pages from

111

Pages count

1

BibTex

@inproceedings{BUT8430,
  author="Antonín {Dlouhý} and Ladislav {Zemčík} and Robert {Válek}",
  title="Near-Gamma TiAl Investment Casting and its Optimization",
  booktitle="TMS 2003",
  year="2004",
  series="1",
  number="1",
  pages="1",
  publisher="The Minerals, Metals + Materials Society",
  address="San Diego, California, USA",
  isbn="0-87339-543-3"
}