## Abstract

A method is proposed for evaluating the strain-hardening exponent (n) and the 0.2% yield stress (σ_{0.2}) for fcc metals solely through the ultra-microhardness technique. To this end, ultra-microhardness (H_{um}) and Vickers hardness (H_{v}) measurements together with tensile tests were carried out for Ni and Al with various n and σ_{0.2}. The value of (H_{v} is proportional to H_{um} at the load P, and the proportional constant depends on P but scarcely on metals. The ratio of _{ um}(P) H_{um0}(P) is scaled solely by n as a linear function independent of the specific metal, where H_{um0}(P) is the value of H_{um}(P) of specimens which show no strain-hardening. Based on the results and Cahoon's relation which relates H_{v}, σ_{0.2} and n, the values of n and σ_{0.2} are evaluated solely through the ultra-microhardness technique. The proposed equation can be explained in terms of a constitutive equation for polycrystalline metals.

Original language | English |
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Pages (from-to) | 1698-1702 |

Number of pages | 5 |

Journal | Journal of Nuclear Materials |

Volume | 212-215 |

Issue number | PART B |

DOIs | |

Publication status | Published - Sept 1994 |

## All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics
- General Materials Science
- Nuclear Energy and Engineering