What question did this study set out to answer?

To examine the indentation size effect in plastically deformed austenitic Hadfield steel during microhardness testing and identify an accurate model for determining true material hardness.

January 28, 2023MaterialsOpen Access

Microhardness, Indentation Size Effect and Real Hardness of Plastically Deformed Austenitic Hadfield Steel

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Authors

QLQuanshun LuoSheffield Hallam University MKMatthew KitchenSheffield Hallam University

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Implication

Experimental testing demonstrates load-dependent indentation size effects in deformed Hadfield steel, indicating that the Nix-Gao model reliably extracts true material hardness.

Key Points

To examine the indentation size effect in plastically deformed austenitic Hadfield steel during microhardness testing and identify an accurate model for determining true material hardness.
Tested three austenitic Hadfield steel samples under different plastic strain states using Vickers microhardness testing with applied loads from 10 to 1000 g.
Evaluated load-indentation diagonal relationships against Kick's law and Meyer's power law, and compared theoretical models including Hays-Kendall, Li-Bradt, Bull, and Nix-Gao formulations.
Load and diagonal dimensions deviated from Kick's law and adhered to Meyer's power law (P = A · d^n with n < 2), driving the observed indentation size effect.
Plastically deformed samples demonstrated pronounced work hardening and distinct indentation size effect behavior compared to non-deformed bulk steel.
The Nix-Gao model successfully determined real hardness values and effectively mapped sliding worn surfaces and subsurface hardness profiles in case studies.

Cite This Study

Luo et al. (2023) studied this question.

synapsesocial.com/papers/6a8c312052e1a91077e997fb https://doi.org/10.3390/ma16031117

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Implication

Experimental testing demonstrates load-dependent indentation size effects in deformed Hadfield steel, indicating that the Nix-Gao model reliably extracts true material hardness.

Microhardness, Indentation Size Effect and Real Hardness of Plastically Deformed Austenitic Hadfield Steel

Discussion

Member takes

Implication

Key Points

Cite This Study

Microhardness, Indentation Size Effect and Real Hardness of Plastically Deformed Austenitic Hadfield Steel

Discussion

Member takes

Implication

Key Points

Cite This Study

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