1218 局所領域の応力ひずみ応答測定へのナノインデンテーション法の適用(J10-1 マイクロ・ナノ材料システムの力学と強度・機能評価(1) 強度・機能評価法開発,ジョイントセッション,21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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There are growing demands for determining the stress-strain relationship at a local area of materials since such knowledge on mechanical properties are indispensable for making a precise CAE analysis of MEMS as well as industrial materials systems. In this work, a load-controlled nanoindentation technique with a spherical tip has been applied to the determinations of stress-strain curves and the Yield stress for a low carbon steel surface. A multiple continuous indentation method is used for measuring load-penetration depth curves. It has been found that the estimated stress-strain curves and the Yield stress are almost agree with those measured by tensile tests when the influence of the residual stress of the specimen surface is taken into account.
2008-08-02