First measurement of the full elastic constants of Ni-based superalloy Rene 88DT

SCRIPTA MATERIALIA

卷:152

Article

Du, Xinpeng¹  Zhao, Ji-Cheng¹ 

[1] Ohio State Univ, Dept Mat Sci & Engn, 2041 Coll Rd, Columbus, OH 43210 USA

关键词: Elastic constants;    Laser ultrasonics;    Superalloy Rene 88DT;    Young's modulus;    Mechanical testing;   

DOI  :  10.1016/j.scriptamat.2018.03.044

来源: Elsevier

【 摘 要 】

The full elastic constants of Ni-based superalloy Rene 88DT were measured for the first time using a recently developed method that matches the computed surface acoustic wave (SAW) velocities from an elastodynamic model with experimental velocities of SAWs that are generated and detected with a femtosecond laser. The experimental measurements were performed on several grains of a polycrystalline sample without the need of growing a single crystal. The computed Young's modulus from the resultant elastic constants agrees with the literature values, lending confidence on our measured elastic constants: C-11 = 267.1, C-12 = 170.5, and C-44 = 107.6 (GPa). (C) 2018 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free