On the role of composition and processing parameters on the microstructure evolution of Ti-xMo alloys

Michael Y. Mendoza; Peyman Samimi; David A. Brice; Iman Ghamarian; Matt Rolchigo; Richard LeSar; Peter C. Collins

doi:10.1186/s13065-019-0529-3

On the role of composition and processing parameters on the microstructure evolution of Ti-xMo alloys

Michael Y. Mendoza, Peyman Samimi, David A. Brice, Iman Ghamarian, Matt Rolchigo, Richard LeSar, Peter C. Collins

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Laser Engineered Net Shaping (LENS) was used to produce a compositionally graded Ti-xMo (0 x 12 wt %) specimen and nine Ti-15Mo (fixed composition) specimens at different energy densities to understand the composition- processing-microstructure relationships operating using additive manufacturing. The gradient was used to evaluate the effect of composition on the prior-beta grain size. The specimens deposited using different energy densities were used to assess the processing parameters influence the microstructure evolutions. The gradient specimen did not show beta grain size reduction with the Mo content. The analysis from the perspective of the two grain refinement mechanisms based on a model known as the Easton & St. John, which was originally developed for aluminum and magnesium alloys shows the lower bound in prior-beta grain refinement with the Ti-Mo system. The low growth restriction factor for the Ti-Mo system of Q = 6,5C0 explains the unsuccessful refinement from the solute-based mechanism. The energy density and the grain size are proportional according to the results of the nine fixed composition specimens at different energy densities. More energy absorption from the material represents bigger molten pools, which in turn relates to lower cooling rates.

Original language	English
Article number	5
Journal	BMC Chemistry
Volume	13
Issue number	3
DOIs	https://doi.org/10.1186/s13065-019-0529-3
State	Published - 2019
Externally published	Yes

Funding

The authors gratefully acknowledge the support of the National Science Foundation (DMREF-1435872, 1606567, 1434462), in which an MGI strategy is adopted. The authors also acknowledge the engagement of industrial partners through the Center for Advanced Non-Ferrous Structural Alloys (CANFSA), an NSF Industry/University Cooperative Research Center (I/UCRC) between Iowa State University and the Colorado School of Mines.

Keywords

Additive manufacturing
Constitutional supercooling
Electron microscopy
Energy density
Grain refinement
Titanium alloys

Access to Document

10.1186/s13065-019-0529-3

Cite this

@article{8a5ce6f0730148cd85feb74810c01b77,

title = "On the role of composition and processing parameters on the microstructure evolution of Ti-xMo alloys",

abstract = "Laser Engineered Net Shaping (LENS) was used to produce a compositionally graded Ti-xMo (0 x 12 wt %) specimen and nine Ti-15Mo (fixed composition) specimens at different energy densities to understand the composition- processing-microstructure relationships operating using additive manufacturing. The gradient was used to evaluate the effect of composition on the prior-beta grain size. The specimens deposited using different energy densities were used to assess the processing parameters influence the microstructure evolutions. The gradient specimen did not show beta grain size reduction with the Mo content. The analysis from the perspective of the two grain refinement mechanisms based on a model known as the Easton & St. John, which was originally developed for aluminum and magnesium alloys shows the lower bound in prior-beta grain refinement with the Ti-Mo system. The low growth restriction factor for the Ti-Mo system of Q = 6,5C0 explains the unsuccessful refinement from the solute-based mechanism. The energy density and the grain size are proportional according to the results of the nine fixed composition specimens at different energy densities. More energy absorption from the material represents bigger molten pools, which in turn relates to lower cooling rates.",

keywords = "Additive manufacturing, Constitutional supercooling, Electron microscopy, Energy density, Grain refinement, Titanium alloys",

author = "Mendoza, {Michael Y.} and Peyman Samimi and Brice, {David A.} and Iman Ghamarian and Matt Rolchigo and Richard LeSar and Collins, {Peter C.}",

year = "2019",

doi = "10.1186/s13065-019-0529-3",

language = "English",

volume = "13",

journal = "BMC Chemistry",

issn = "2661-801X",

publisher = "BioMed Central",

number = "3",

}

TY - JOUR

T1 - On the role of composition and processing parameters on the microstructure evolution of Ti-xMo alloys

AU - Mendoza, Michael Y.

AU - Samimi, Peyman

AU - Brice, David A.

AU - Ghamarian, Iman

AU - Rolchigo, Matt

AU - LeSar, Richard

AU - Collins, Peter C.

PY - 2019

Y1 - 2019

N2 - Laser Engineered Net Shaping (LENS) was used to produce a compositionally graded Ti-xMo (0 x 12 wt %) specimen and nine Ti-15Mo (fixed composition) specimens at different energy densities to understand the composition- processing-microstructure relationships operating using additive manufacturing. The gradient was used to evaluate the effect of composition on the prior-beta grain size. The specimens deposited using different energy densities were used to assess the processing parameters influence the microstructure evolutions. The gradient specimen did not show beta grain size reduction with the Mo content. The analysis from the perspective of the two grain refinement mechanisms based on a model known as the Easton & St. John, which was originally developed for aluminum and magnesium alloys shows the lower bound in prior-beta grain refinement with the Ti-Mo system. The low growth restriction factor for the Ti-Mo system of Q = 6,5C0 explains the unsuccessful refinement from the solute-based mechanism. The energy density and the grain size are proportional according to the results of the nine fixed composition specimens at different energy densities. More energy absorption from the material represents bigger molten pools, which in turn relates to lower cooling rates.

AB - Laser Engineered Net Shaping (LENS) was used to produce a compositionally graded Ti-xMo (0 x 12 wt %) specimen and nine Ti-15Mo (fixed composition) specimens at different energy densities to understand the composition- processing-microstructure relationships operating using additive manufacturing. The gradient was used to evaluate the effect of composition on the prior-beta grain size. The specimens deposited using different energy densities were used to assess the processing parameters influence the microstructure evolutions. The gradient specimen did not show beta grain size reduction with the Mo content. The analysis from the perspective of the two grain refinement mechanisms based on a model known as the Easton & St. John, which was originally developed for aluminum and magnesium alloys shows the lower bound in prior-beta grain refinement with the Ti-Mo system. The low growth restriction factor for the Ti-Mo system of Q = 6,5C0 explains the unsuccessful refinement from the solute-based mechanism. The energy density and the grain size are proportional according to the results of the nine fixed composition specimens at different energy densities. More energy absorption from the material represents bigger molten pools, which in turn relates to lower cooling rates.

KW - Additive manufacturing

KW - Constitutional supercooling

KW - Electron microscopy

KW - Energy density

KW - Grain refinement

KW - Titanium alloys

UR - http://www.scopus.com/inward/record.url?scp=85090028610&partnerID=8YFLogxK

U2 - 10.1186/s13065-019-0529-3

DO - 10.1186/s13065-019-0529-3

M3 - Article

AN - SCOPUS:85090028610

SN - 2661-801X

VL - 13

JO - BMC Chemistry

JF - BMC Chemistry

IS - 3

M1 - 5

ER -

On the role of composition and processing parameters on the microstructure evolution of Ti-xMo alloys

Abstract

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this