Residual stresses and microstructure of H13 steel formed by combining two different direct fabrication methods

P. J. Maziasz; E. A. Payzant; M. E. Schlienger; K. M. McHugh

doi:10.1016/S1359-6462(98)00349-2

Residual stresses and microstructure of H13 steel formed by combining two different direct fabrication methods

P. J. Maziasz, E. A. Payzant, M. E. Schlienger, K. M. McHugh

Materials Engineering

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

32 Scopus citations

Abstract

Direct fabrication techniques can be combined to produce composite DF specimens, with spray-forming rapidly building up the base material for die-surface features and backing, and LENS creating the other final-surface or fine-detail features. Residual stresses are lower, and the microstructural "processing zone" that marks the transition between the characteristic structure of each native DF process is narrower, for LENS deposited directly on the final as-spray-formed surface instead of a mechanically polished surface. Stress-relief of the spray-formed H-13 steel prior to additional LENS processing may also lower the residual stresses across the transition interface. Very large residual stresses can exist in H-13 steel across the interface between the two inherently different DF processes. However, proper characterization feedback should allow surface preparation and heat-treatment parameters to be chosen which minimize such stresses.

Original language	English
Pages (from-to)	1471-1476
Number of pages	6
Journal	Scripta Materialia
Volume	39
Issue number	10
DOIs	https://doi.org/10.1016/S1359-6462(98)00349-2
State	Published - Oct 13 1998

Funding

Thanks to E.H. Lee for metallography of the various H-13 steel specimens. Research sponsored by the Laboratory Directed Research and Development Program of the Oak Ridge National Laboratory, and in part by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Transportation Technologies as part of the High Temperature Materials Laboratory User Program at the Oak Ridge National Laboratory and also by the Division of Materials Science, Office of Basic Energy Sciences, U.S. Department of Energy, under Contract DE-AC05–96OR22464 with Lockheed Martin Energy Research Corp.

Funders	Funder number
Division of Materials Science
Office of Basic Energy Sciences
Office of Transportation Technologies
U.S. Department of Energy	DE-AC05–96OR22464
Office of Energy Efficiency and Renewable Energy
Oak Ridge National Laboratory

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Residual stresses and microstructure of H13 steel formed by combining two different direct fabrication methods

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