Open-Cellular Co-Base and Ni-Base Superalloys Fabricated by Electron Beam Melting

Lawrence Murr; Shujun Li; Yuxing Tian; Krista Amato; Edwin Martinez; Frank Medina

doi:10.3390/ma4040782

Open-Cellular Co-Base and Ni-Base Superalloys Fabricated by Electron Beam Melting

Materials (Basel). 2011 Apr 14;4(4):782-790. doi: 10.3390/ma4040782.

Authors

Lawrence Murr^{1

2}, Shujun Li³, Yuxing Tian⁴, Krista Amato^{5

6}, Edwin Martinez^{7

8}, Frank Medina⁹

Affiliations

¹ Department of Metallurgical and Materials Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA. lemurr@utep.edu.
² W. M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, TX 79968, USA. lemurr@utep.edu.
³ Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning 11016, China. shjli@imr.ac.cn.
⁴ Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, Liaoning 11016, China.
⁵ Department of Metallurgical and Materials Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA. knamato@miners.utep.edu.
⁶ W. M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, TX 79968, USA. knamato@miners.utep.edu.
⁷ Department of Metallurgical and Materials Engineering, The University of Texas at El Paso, El Paso, TX 79968, USA. emartinez21@miners.utep.edu.
⁸ W. M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, TX 79968, USA. emartinez21@miners.utep.edu.
⁹ W. M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, TX 79968, USA. frmedina@utep.edu.

Abstract

Reticulated mesh samples of Co-29Cr-6Mo alloy and Ni-21Cr-9Mo-4Nb alloy (625) and stochastic foam samples of Co-29Cr-6Mo alloy fabricated by electron beam melting were characterized by optical metallography, and the dynamic stiffness (Young's modulus) was measured by resonant frequency analysis. The relative stiffness (E/E_s) versus relative density (ρ/ρ_s) plotted on a log-log basis resulted in a fitted straight line with a slope n ≅ 2, consistent with that for ideal open cellular materials.

Keywords: dynamic stiffness; electron beam melting; mesh and foam structures; microstructures; superalloys.