Experimental Microstructure Evaluation of Rene 80 in Laser Cladding

被引：4

作者：

Huarte-Mendicoa L. ^{[1
]}

Penaranda X. ^{[1
]}

Lamikiz A. ^{[2
]}

Moralejo S. ^{[1
]}

机构：

[1] IK4-IDEKO Research Center, Pg. Arriaga 2, Elgoibar

[2] Department of Mechanical Engineering, University of the Basque Country ETSI, ETSII-UPV, c/Alameda de Urquijo s/n, Bilbao

来源：

Lasers in Manufacturing and Materials Processing | 2019年 / 6卷 / 3期

关键词：

Aero engine repair; Laser cladding; Nickel-based superalloy; Process monitoring; Rene; 80; Single crystal;

D O I：

10.1007/s40516-019-00096-w

中图分类号：

学科分类号：

摘要：

In this paper the input process parameters of Rene 80 laser cladding are correlated with the obtained microstructure. Different microstructures from single crystal (SX) to polycrystalline are revealed in function of the operating range, with the energy density governing the result. Several experiments are performed over plates and thin machined walls to characterise the behaviour of the system, showing independence of the microstructure with the base width. Metallographic analysis shows that the resulted material build-up matches microstructure between substrate and clad material. Microhardness evaluation presents constant results in SX samples, reaching values similar to those presented in tests with extra homogenization heat treatments. A same tendency is observed in melt pool minor axis monitorization. It exhibits a slight deviation from a fixed value for SX cladded material and shows a bigger shift with the apparition of equiaxed grains. The suitability of the SX operating window is verified in the repair of a blade tip with variable width. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.

引用

页码：317 / 331

页数：14

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