Paper Title:
A Novel Canning Technology for Forging of Gamma-TiAl Alloys
  Abstract

A novel canning technology to forge gamma-TiAl alloys was developed at the BTU Cottbus. A TiAl specimen was encapsulated with multilayer stainless steel foil and glass. The steel foil layers prevented the heat loss through radiation and the glass layer reduced the temperature decrease through conduction. First, the effect of steel foil on the cooling rate was investigated. Cooling curves were recorded for TiAl specimens without steel foil layer, with 1, 2, 3 and 4 layers of steel foil, as well as with 3 coated steel foil layers, respectively. While the unprotected specimen cooled from 1200 °C to 1100 °C within 12 s, the specimen with 3 coated steel foil layers needed 52 s for the same temperature decrease. The efficiency of the glass layer was examined with forging of steel specimens. The cooling rate during forging of the specimen with a glass layer was only half of that without a glass layer. Based on the results, Ti-45Al-0.5Mo-0.5Cu-0.2Si specimens, canned with steel foil and glass, were successfully forged at strain rates of 0.1 s-1 and 0.04 s-1 with warm dies which were heated to 500 °C. Visual and metallographic examinations revealed no cracks, pores or micropores. The microstructures are fine-equiaxed grains.

  Info
Periodical
Materials Science Forum (Volumes 546-549)
Edited by
Yafang Han et al.
Pages
1421-1426
DOI
10.4028/www.scientific.net/MSF.546-549.1421
Citation
J. Zhang, A. Kutzsche, K. Rosenberg, C. Leyens, B. Viehweger, "A Novel Canning Technology for Forging of Gamma-TiAl Alloys", Materials Science Forum, Vols. 546-549, pp. 1421-1426, 2007
Online since
May 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Jin Young Kim, In Ok Shim, Soon Hyung Hong
Abstract:The effect of initial lamellar structure of β heat treated Ti-6Al-4V alloy on the globularization behavior during the multi-step forging was...
529
Authors: Peter Janschek
Abstract:A new material is available that displays the high temperature mechanical properties of nickel alloys at half the density –the intermetallic...
1353
Authors: Tao Wang, Hong Zhen Guo, Jian Hua Zhang, Ze Kun Yao
Abstract:The microstructures and room temperature and 600°C tensile properties of Ti-5.8Al-4.0Sn-4.0Zr-0.7Nb -0.4Si-1.5Ta alloy after isothermal...
153
Authors: Ju Zhou, Chang Jun Qiu, Xi Yang Cheng
Chapter 4: Material Science and Technology
Abstract:During the process of laser cladding thin-walled components, warping deformation generated on the thin-walled components due to the...
1038
Authors: Dirk Rosenstock, Eric Thore Segebade, Gerhard Hirt
Chapter 2: Forging and Rolling
Abstract:To reduce the failure of dies by abrasive wear, mechanical fatigue and thermal fatigue in closed-die forging usually measures like nitriding,...
266