Microstructural Evaluation of LENS™ Deposited Nb-Ti-Si-Cr Alloys

Ryan R. Dehoff; Peter M. Sarosi; Peter C. Collins; Hamish L. Fraser; Michael J. Mills

Microstructural Evaluation of LENS™ Deposited Nb-Ti-Si-Cr Alloys

Ryan R. Dehoff, Peter M. Sarosi, Peter C. Collins, Hamish L. Fraser, Michael J. Mills

Research output: Contribution to journal › Conference article › peer-review

3 Scopus citations

Abstract

Nb-Ti-Si "in-situ" metal ceramic composites consist of Nb ₃Si and Nb₅Si₃ intermetallic phases in a body centered cubic Nb solid solution, and show promising potential for elevated temperature structural applications. The addition of Cr has also been shown to increase the oxidation resistance at high temperatures. In this study, the LENS™ (Laser Engineered Net Shaping) process is being implemented to construct the Nb-Ti-Cr alloy system from elemental powder blends. Advantages of the LENS™ process include the ability to produce near net shaped components with graded compositions as well as a more uniform microstructure resulting from the negative enthalpy of mixing associated with the suicide phases. This study focuses on characterization of the microstructure of the Nb-27Ti-5Si-10Cr (at%) system using SEM and TEM analysis.

Original language	English
Pages (from-to)	77-82
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	753
State	Published - 2003
Externally published	Yes
Event	Defect Properties and Related Phenomena in Intermetallic Alloys - Boston, MA, United States Duration: Dec 3 2002 → Dec 5 2002

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@article{9e86d67ee42d465ca4e9ed09f93b47b5,

title = "Microstructural Evaluation of LENS{\texttrademark} Deposited Nb-Ti-Si-Cr Alloys",

abstract = "Nb-Ti-Si {"}in-situ{"} metal ceramic composites consist of Nb 3Si and Nb5Si3 intermetallic phases in a body centered cubic Nb solid solution, and show promising potential for elevated temperature structural applications. The addition of Cr has also been shown to increase the oxidation resistance at high temperatures. In this study, the LENS{\texttrademark} (Laser Engineered Net Shaping) process is being implemented to construct the Nb-Ti-Cr alloy system from elemental powder blends. Advantages of the LENS{\texttrademark} process include the ability to produce near net shaped components with graded compositions as well as a more uniform microstructure resulting from the negative enthalpy of mixing associated with the suicide phases. This study focuses on characterization of the microstructure of the Nb-27Ti-5Si-10Cr (at%) system using SEM and TEM analysis.",

author = "Dehoff, {Ryan R.} and Sarosi, {Peter M.} and Collins, {Peter C.} and Fraser, {Hamish L.} and Mills, {Michael J.}",

year = "2003",

language = "English",

volume = "753",

pages = "77--82",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

note = "Defect Properties and Related Phenomena in Intermetallic Alloys ; Conference date: 03-12-2002 Through 05-12-2002",

}

TY - JOUR

T1 - Microstructural Evaluation of LENS™ Deposited Nb-Ti-Si-Cr Alloys

AU - Dehoff, Ryan R.

AU - Sarosi, Peter M.

AU - Collins, Peter C.

AU - Fraser, Hamish L.

AU - Mills, Michael J.

PY - 2003

Y1 - 2003

N2 - Nb-Ti-Si "in-situ" metal ceramic composites consist of Nb 3Si and Nb5Si3 intermetallic phases in a body centered cubic Nb solid solution, and show promising potential for elevated temperature structural applications. The addition of Cr has also been shown to increase the oxidation resistance at high temperatures. In this study, the LENS™ (Laser Engineered Net Shaping) process is being implemented to construct the Nb-Ti-Cr alloy system from elemental powder blends. Advantages of the LENS™ process include the ability to produce near net shaped components with graded compositions as well as a more uniform microstructure resulting from the negative enthalpy of mixing associated with the suicide phases. This study focuses on characterization of the microstructure of the Nb-27Ti-5Si-10Cr (at%) system using SEM and TEM analysis.

AB - Nb-Ti-Si "in-situ" metal ceramic composites consist of Nb 3Si and Nb5Si3 intermetallic phases in a body centered cubic Nb solid solution, and show promising potential for elevated temperature structural applications. The addition of Cr has also been shown to increase the oxidation resistance at high temperatures. In this study, the LENS™ (Laser Engineered Net Shaping) process is being implemented to construct the Nb-Ti-Cr alloy system from elemental powder blends. Advantages of the LENS™ process include the ability to produce near net shaped components with graded compositions as well as a more uniform microstructure resulting from the negative enthalpy of mixing associated with the suicide phases. This study focuses on characterization of the microstructure of the Nb-27Ti-5Si-10Cr (at%) system using SEM and TEM analysis.

UR - http://www.scopus.com/inward/record.url?scp=0242353361&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:0242353361

SN - 0272-9172

VL - 753

SP - 77

EP - 82

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

T2 - Defect Properties and Related Phenomena in Intermetallic Alloys

Y2 - 3 December 2002 through 5 December 2002

ER -

Microstructural Evaluation of LENS™ Deposited Nb-Ti-Si-Cr Alloys

Abstract

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