Modeling of thermal deformation behavior near γ′ solvus in a Ni-based powder metallurgy superalloy

The solidification shrinkage of liquid steel has an important impact on thermal deformation behavior of high-temperature thin shell. Solidification shrinkage of liquid steel is an important basis for structure and shap optimization of the mould. In this paper, a direct coupled model was built on heat transfer in solidification and stress-strain by using the ANSYS software. And solidification shrinkage of liquid steel with the interior temperature and stress distribution were studied in the process of steel solidification, and it provided a theoretical basis for the further optimization of shape of the thin slab FTSC mould. This study was based on analysis of temperature and stress, deriving calculation of solidification shrinkage of steel’s phase change on macro-state by calculating the variation discipline of the distance between nodes.

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Thermal deformation behavior of γ-TiAl based alloy by plasma hydrogenation

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2020.09.008 ◽

2020 ◽

Vol 45 (58) ◽

pp. 34214-34226

Author(s):

Fuyu Dong ◽

Yongda Liu ◽

Yue Zhang ◽

Weidong Li ◽

Peter K. Liaw ◽

...

Keyword(s):

Deformation Behavior ◽

Thermal Deformation ◽

Plasma Hydrogenation

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Using the P-δ2 analysis to deconvolute the nanoindentation response of hard-coated systems

Journal of Materials Research ◽

10.1557/jmr.1999.0305 ◽

1999 ◽

Vol 14 (6) ◽

pp. 2283-2295 ◽

Cited By ~ 70

Author(s):

M. R. McGurk ◽

T. F. Page

Keyword(s):

Powder Metallurgy ◽

Coating Thickness ◽

Stainless Steels ◽

Deformation Behavior ◽

Surface Deformation ◽

Near Surface ◽

Nitride Coatings ◽

Load Displacement ◽

Point To Point ◽

The Relationship

The continuously recording indentation responses of a number of coated systems, mainly thin (<10 μm) hard nitride coatings on stainless steels and a powder metallurgy tool steel, have been explored using nanoindentation with indenter displacements increasing progressively to values greater than the coating thickness. The resultant load-displacement data have been analyzed not only to produce conventional load-displacement (P-δ) plots but also to examine the relationship between P and δ2. Recent models have proposed that there should be a linear P-δ2 relationship for homogeneous systems and that such plots have the potential to reveal the load/displacement regimes in which either the coating or the substrate, or both, are dominant in controlling the overall behavior of the coated system. By utilizing point-to-point differentiation of the P-δ2 relationship, this paper extends this approach to confirm not only that these different regimes of behavior may be readily experimentally identified in this way, but also that further details, such as the propagation of cracks, may be recognized. Our analysis also provides a valuable experimental link to models describing the near-surface deformation behavior of coated systems.

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