Skip to main content Accessibility help
×
Home
Hostname: page-component-dc8c957cd-wvcbk Total loading time: 0.282 Render date: 2022-01-27T09:50:55.279Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": true, "newCiteModal": false, "newCitedByModal": true, "newEcommerce": true, "newUsageEvents": true }

Article contents

Microstructure of gas atomised γ-TiAl based alloy powders

Published online by Cambridge University Press:  23 January 2017

Daniel Laipple*
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany
Li Wang
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany
Marcus Rackel
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany
Andreas Stark
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany
Bernd Schwebke
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany Institut für Werkstoffkunde und Werkstofftechnik, TU Clausthal, 38678 Clausthal-Zellerfeld
Andreas Schreyer
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany European Spallation Source ERIC, P.O. Box 176, SE-221 00 Lund, Sweden
Florian Pyczak
Affiliation:
Institute of Materials Research, Helmholtz-Zentrum Geesthacht, 21502 Geesthacht, Germany
Get access

Abstract

Due to the rapid development of advanced additive manufacturing production routes in recent years, the demand of high-quality alloy powders is significantly increased. We studied gas-atomised spherical powders of several Nb-bearing γ-TiAl based alloys, Ti-45Al-10Nb and Ti-45Al-5Nb-xC in at.% (x = 0, 0.5, 0.75, and 1), which were produced using the plasma melting induction guided gas atomization (PIGA) technique. The phase constitution of different powder fractions was determined by synchrotron high-energy X-ray diffraction at the HEMS beamline DESY (Germany), as well as by SEM, EDX and EBSD measurements. Due to the high cooling rates in the range of 105 K/s, the powder particles mainly consist of hexagonal close packed α-Ti(Al) and body centred cubic β-Ti(Al)-phase. As the cooling rate depends on the particle size, considerable amounts of the β-phase were only found in the small powder fractions (< 45 μm). The total β-phase amount was generally higher in the alloy with a higher Nb content, and also the effect of carbon as a α2-stabilizer was observed. Dendritic cauliflower-like structures are more pronounced in bigger powder particles due to the slower solidification and thus a higher Nb depletion in the remaining melt.

Type
Articles
Copyright
Copyright © Materials Research Society 2017 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Gerling, R., Clemens, H., and Schimansky, F. P., Advanced Engineering Materials, 6 (2004), 2338.CrossRef
Bewlay, B.P., Weimer, M., Kelly, T., Suzuki, A., Subramanian, P.R., Materials Research Society Symposium Proceedings, 1516, (2013), 4958. doi: 10.1557/opl.2013.44 CrossRef
Jabbar, H., Monchoux, J.-P., Houdellier, F., Dollé, M., Schimansky, F.-P., Pyczak, F., Thomas, M., Couret, A., Intermetallics, 18, (2010), 23122321. doi: 10.1016/j.intermet.2010.07.024 CrossRef
Gussone, J., Hagedorn, Y.-C., Gherekhloo, H., Kasperovich, G., Merzouk, T., Hausmann, J., Intermetallics, 66, (2015), 133140. doi: 10.1016/j.intermet.2015.07.005 CrossRef
Baudana, G., Biamino, S., Klöden, B., Kirchner, A., Weißgärber, T., Kieback, B., Pavese, M., Ugues, D., Fino, P., Badini, C., Intermetallics, 73, (2016), 4349. doi: 10.1016/j.intermet.2016.03.001 CrossRef
Hammersley, A. P., Svensson, S. O., Hanfland, M., Fitch, A. N., Hausermann, D., High Pressure Research 1996, 14, 235248,CrossRef
Kraus, W., Nolze, G., Journal of applied Crystallography 29 (1996), 301303. doi: 10.1107/S0021889895014920 CrossRef
Laipple, D., Stark, A., Schimansky, F.-P., Schwebke, B., Pyczak, F., Schreyer, A., Key Engineering Materials, 704 (2016), 214222. doi: 10.4028/www.scientific.net/KEM.704.214 CrossRef
Mayer, S., Petersmann, M., Fischer, F.D., Clemens, H., Waitz, T., Antretter, T., Acta Materialia 115 (2016), 242249. doi: 10.1016/j.actamat.2016.06.006 CrossRef

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Microstructure of gas atomised γ-TiAl based alloy powders
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Microstructure of gas atomised γ-TiAl based alloy powders
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Microstructure of gas atomised γ-TiAl based alloy powders
Available formats
×
×

Reply to: Submit a response

Please enter your response.

Your details

Please enter a valid email address.

Conflicting interests

Do you have any conflicting interests? *