In Situ Neutron Diffraction Study of the Influence of Microstructure on the Mechanical Response of Additively Manufactured 304L Stainless Steel

D. W. Brown; D. P. Adams; L. Balogh; J. S. Carpenter; B. Clausen; G. King; B. Reedlunn; T. A. Palmer; M. C. Maguire; S. C. Vogel

doi:10.1007/s11661-017-4330-4

In Situ Neutron Diffraction Study of the Influence of Microstructure on the Mechanical Response of Additively Manufactured 304L Stainless Steel

D. W. Brown, D. P. Adams, L. Balogh, J. S. Carpenter, B. Clausen, G. King, B. Reedlunn, T. A. Palmer, M. C. Maguire, S. C. Vogel

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50 Scopus citations

Abstract

In situ neutron diffraction measurements were completed during tensile and compressive deformation of stainless steel 304L additively manufactured (AM) using a high power directed energy deposition process. Traditionally produced wrought 304L material was also studied for comparison. The AM material exhibited roughly 200 MPa higher flow stress relative to the wrought material. Crystallite size, crystallographic texture, dislocation density, and lattice strains were all characterized to understand the differences in the macroscopic mechanical behavior. The AM material’s initial dislocation density was about 10 times that of the wrought material, and the flow strength of both materials obeyed the Taylor equation, indicating that the AM material’s increased yield strength was primarily due to greater dislocation density. Also, a ~50 MPa flow strength tension/compression asymmetry was observed in the AM material, and several potential causes were examined.

Original language	English (US)
Pages (from-to)	6055-6069
Number of pages	15
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	48
Issue number	12
DOIs	https://doi.org/10.1007/s11661-017-4330-4
State	Published - Dec 1 2017

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys

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10.1007/s11661-017-4330-4

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Brown, D. W., Adams, D. P., Balogh, L., Carpenter, J. S., Clausen, B., King, G., Reedlunn, B., Palmer, T. A., Maguire, M. C., & Vogel, S. C. (2017). In Situ Neutron Diffraction Study of the Influence of Microstructure on the Mechanical Response of Additively Manufactured 304L Stainless Steel. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 48(12), 6055-6069. https://doi.org/10.1007/s11661-017-4330-4

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title = "In Situ Neutron Diffraction Study of the Influence of Microstructure on the Mechanical Response of Additively Manufactured 304L Stainless Steel",

abstract = "In situ neutron diffraction measurements were completed during tensile and compressive deformation of stainless steel 304L additively manufactured (AM) using a high power directed energy deposition process. Traditionally produced wrought 304L material was also studied for comparison. The AM material exhibited roughly 200 MPa higher flow stress relative to the wrought material. Crystallite size, crystallographic texture, dislocation density, and lattice strains were all characterized to understand the differences in the macroscopic mechanical behavior. The AM material{\textquoteright}s initial dislocation density was about 10 times that of the wrought material, and the flow strength of both materials obeyed the Taylor equation, indicating that the AM material{\textquoteright}s increased yield strength was primarily due to greater dislocation density. Also, a ~50 MPa flow strength tension/compression asymmetry was observed in the AM material, and several potential causes were examined.",

author = "Brown, {D. W.} and Adams, {D. P.} and L. Balogh and Carpenter, {J. S.} and B. Clausen and G. King and B. Reedlunn and Palmer, {T. A.} and Maguire, {M. C.} and Vogel, {S. C.}",

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doi = "10.1007/s11661-017-4330-4",

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Brown, DW, Adams, DP, Balogh, L, Carpenter, JS, Clausen, B, King, G, Reedlunn, B, Palmer, TA, Maguire, MC & Vogel, SC 2017, 'In Situ Neutron Diffraction Study of the Influence of Microstructure on the Mechanical Response of Additively Manufactured 304L Stainless Steel', Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, vol. 48, no. 12, pp. 6055-6069. https://doi.org/10.1007/s11661-017-4330-4

In Situ Neutron Diffraction Study of the Influence of Microstructure on the Mechanical Response of Additively Manufactured 304L Stainless Steel. / Brown, D. W.; Adams, D. P.; Balogh, L. et al.
In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, Vol. 48, No. 12, 01.12.2017, p. 6055-6069.

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

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AU - Brown, D. W.

AU - Adams, D. P.

AU - Balogh, L.

AU - Carpenter, J. S.

AU - Clausen, B.

AU - King, G.

AU - Reedlunn, B.

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AU - Maguire, M. C.

AU - Vogel, S. C.

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AB - In situ neutron diffraction measurements were completed during tensile and compressive deformation of stainless steel 304L additively manufactured (AM) using a high power directed energy deposition process. Traditionally produced wrought 304L material was also studied for comparison. The AM material exhibited roughly 200 MPa higher flow stress relative to the wrought material. Crystallite size, crystallographic texture, dislocation density, and lattice strains were all characterized to understand the differences in the macroscopic mechanical behavior. The AM material’s initial dislocation density was about 10 times that of the wrought material, and the flow strength of both materials obeyed the Taylor equation, indicating that the AM material’s increased yield strength was primarily due to greater dislocation density. Also, a ~50 MPa flow strength tension/compression asymmetry was observed in the AM material, and several potential causes were examined.

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In Situ Neutron Diffraction Study of the Influence of Microstructure on the Mechanical Response of Additively Manufactured 304L Stainless Steel

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