Evolution of Tantalum Content During Vacuum Induction Melting and Electroslag Remelting of a Novel Martensitic Steel
Abstract
The need for materials with superior thermal and mechanical properties while mitigating cost increases interest in new complex alloy compositions which brings challenges to manufacturing processes. In this investigation, vacuum induction melting (VIM) and electroslag remelting (ESR) of a novel tantalum (Ta)-containing martensitic steel was performed using standard industry practices at a laboratory scale. A 25 pct loss of Ta was measured from the VIM electrode to the ESR ingot using X-ray fluorescence. Several tools were used for broad characterization of the ingots, including LECO for chemistry analysis, scanning electron microscopy, and electron probe microanalysis for observation of the precipitate and inclusion phases post-VIM and post-ESR as well as computational modeling of the ESR process for the calculation of macrosegregation and inclusion travel. Here, it was found that a significant amount of Ta2O5 inclusions formed during VIM and were transferred to the slag during ESR. While ESR was particularly successful at decreasing the number density of inclusions by 95 pct, additional efforts are needed with regard to vacuum leak rate and purity of stock material when melting novel advanced steels.
- Authors:
-
- National Energy Technology Lab. (NETL), Albany, OR (United States); Leidos Research Support Team, Pittsburgh, PA (United States)
- National Energy Technology Lab. (NETL), Albany, OR (United States)
- Publication Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1582384
- Report Number(s):
- NA
Journal ID: ISSN 1073-5615
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science
- Additional Journal Information:
- Journal Volume: 50; Journal Issue: 4; Journal ID: ISSN 1073-5615
- Publisher:
- ASM International
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Detrois, Martin, Jablonski, Paul D., and Hawk, Jeffrey A. Evolution of Tantalum Content During Vacuum Induction Melting and Electroslag Remelting of a Novel Martensitic Steel. United States: N. p., 2019.
Web. doi:10.1007/s11663-019-01614-z.
Detrois, Martin, Jablonski, Paul D., & Hawk, Jeffrey A. Evolution of Tantalum Content During Vacuum Induction Melting and Electroslag Remelting of a Novel Martensitic Steel. United States. https://doi.org/10.1007/s11663-019-01614-z
Detrois, Martin, Jablonski, Paul D., and Hawk, Jeffrey A. Fri .
"Evolution of Tantalum Content During Vacuum Induction Melting and Electroslag Remelting of a Novel Martensitic Steel". United States. https://doi.org/10.1007/s11663-019-01614-z. https://www.osti.gov/servlets/purl/1582384.
@article{osti_1582384,
title = {Evolution of Tantalum Content During Vacuum Induction Melting and Electroslag Remelting of a Novel Martensitic Steel},
author = {Detrois, Martin and Jablonski, Paul D. and Hawk, Jeffrey A.},
abstractNote = {The need for materials with superior thermal and mechanical properties while mitigating cost increases interest in new complex alloy compositions which brings challenges to manufacturing processes. In this investigation, vacuum induction melting (VIM) and electroslag remelting (ESR) of a novel tantalum (Ta)-containing martensitic steel was performed using standard industry practices at a laboratory scale. A 25 pct loss of Ta was measured from the VIM electrode to the ESR ingot using X-ray fluorescence. Several tools were used for broad characterization of the ingots, including LECO for chemistry analysis, scanning electron microscopy, and electron probe microanalysis for observation of the precipitate and inclusion phases post-VIM and post-ESR as well as computational modeling of the ESR process for the calculation of macrosegregation and inclusion travel. Here, it was found that a significant amount of Ta2O5 inclusions formed during VIM and were transferred to the slag during ESR. While ESR was particularly successful at decreasing the number density of inclusions by 95 pct, additional efforts are needed with regard to vacuum leak rate and purity of stock material when melting novel advanced steels.},
doi = {10.1007/s11663-019-01614-z},
journal = {Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science},
number = 4,
volume = 50,
place = {United States},
year = {Fri May 31 00:00:00 EDT 2019},
month = {Fri May 31 00:00:00 EDT 2019}
}
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