The detrimental effect of elemental contaminants when using B additions to improve the creep properties of a Ni-based superalloy

Detrois, Martin; Pei, Zongrui; Liu, Tao; Poplawsky, Jonathan D.; Gao, Michael; Jablonski, Paul; Hawk, Jeffrey A.

doi:10.1016/j.scriptamat.2021.113971

The detrimental effect of elemental contaminants when using B additions to improve the creep properties of a Ni-based superalloy

Journal Article · Sun Aug 01 00:00:00 EDT 2021 · Scripta Materialia

DOI:https://doi.org/10.1016/j.scriptamat.2021.113971· OSTI ID:1814256

^[1]; ^[2]; Liu, Tao ^[1]; ^[3]; Gao, Michael ^[1]; Jablonski, Paul ^[1]; ^[1]

National Energy Technology Lab. (NETL), Albany, OR (United States)
National Energy Technology Lab. (NETL), Albany, OR (United States); Oak Ridge Inst. for Science and Education (ORISE), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The effect of Si contamination when using B to improve the creep properties of a Ni-based superalloy was investigated using advanced characterization techniques and first-principles simulations on alloys with high and low B levels with varying Si contents. The positive effect of B segregation along grain boundaries on the creep properties was mitigated by the presence of Si which showed a similar segregation preference. Density functional theory calculations were used for validation by calculating grain boundary cleavage energies. Silicon was shown to decrease grain boundary cohesion which offsets the positive effect of B.

View Accepted Manuscript (DOE)

Research Organization:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Fossil Energy (FE); USDOE Office of Fossil Energy and Carbon Management (FECM)

Grant/Contract Number:: 89243318CFE000003; AC05-00OR22725

OSTI ID:: 1814256

Alternate ID(s):: OSTI ID: 1842306
OSTI ID: 1782338
OSTI ID: 23196728

Journal Information:: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: N/A Vol. 201; ISSN 1359-6462

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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