Influence of Etchants on Phase Morphology of Casting Ni-Based Superalloy

Juan Juan Li; Shu Jun Zang; Jian Bin Zhang

doi:10.4028/www.scientific.net/AMR.887-888.366

Paper Titles

Cube Texture Formation of Cu-33at.%Ni Alloy Substrates and CeO₂ Buffer Layer for YBCO Coated Conductors
p.345

Research on the Microstructure and Properties of Hypereutectic Al-Si Alloy for Semi-Solid Forming during Heat Treatment
p.349

Corrosion Behavior of Incoloy 800 in Molten Nitrate Salt
p.357

Effect of Ti on the Structure and Properties of Cu-15Ni-10Mn Alloy As-Cast Smelted at Atmosphere
p.362

Influence of Etchants on Phase Morphology of Casting Ni-Based Superalloy
p.366

The Measured Change in d-Electron of Ni in Ni-7.2at%Ti Alloy Studied by Electron Energy Loss Spectroscopy
p.370

Effect of Homogenization Annealing on Microstructure and Property of Cu-7.5Ni-5Sn Alloy
p.374

Effect of Alloying Elements V, Cr and Ni on the Electronic Structure and Mechanical Properties of FeAl from First-Principles Calculation
p.378

Effects of Additives on the Surface Layers of Boronized TC4 Titanium Alloys
p.384

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 887-888Influence of Etchants on Phase Morphology of...

Influence of Etchants on Phase Morphology of Casting Ni-Based Superalloy

Abstract:

K4169 is the Nickel-base superalloy that is the most widely used in the turbine components. The article selects three kinds of etching solution to corrode, in order to achieve the purpose that studies on its morphology. Etchant1 is the mixed solution of 15mlHCl, 10mlAcetic acid, 5mlHNO₃ and 2drop glycerin. Etchant2 is the mixed solution of 3ml glycerin, 3mlHCl, 1ml HNO₃. Etchant 3 is the mixed solution of 20mlHNO₃, 60mlHCl. The results showed that we can mainly observe strengthened phase γ'' (Ni₃ (Ti, Al)) and matrix γ (Fe-Ni-Cr) phase with etchant1 to corrode. Using the etchant2 to corrode, we can clearly see its dendrite structure. Using the etchant3 to corrode, we can obverse its grain boundary that includes white inter-metallic compounds. We also respectively discussed the K4169 morphology when magnifications are 200times and 500times.