建筑方向对电子束熔炼增材制造的Inconel 718合金氧化行为的影响

Influence of Building Direction on the Oxidation Behavior of Inconel 718 Alloy Fabricated by Additive Manufacture of Electron Beam Melting.

作者信息

Li Lv, Gong Xiaojuan, Ye Xianjue, Teng Jianwei, Nie Yan, Li Yunping, Lei Qian

机构信息

School of Materials Science and Engineering, Central South University, Changsha 410083, China.

State Key Lab for Powder Metallurgy, Central South University, Changsha 410083, China.

出版信息

Materials (Basel). 2018 Dec 14;11(12):2549. doi: 10.3390/ma11122549.

DOI:10.3390/ma11122549

PMID:30558172

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6316576/

Abstract

This research was aimed at investigating the high temperature oxidation behavior of Inconel 718 superalloy fabricated by electron beam melting with the building direction of 0°, 55° and 90° deviation from the Z axis of cylindrical samples. Columnar γ-fcc phase with preferred crystal orientations was found in all specimens. With the temperature ranging from 700 to 1000 °C, the 0° sample, symbolized by the lowest grain boundary density, and largest grain size, reveals the best oxidation performance. It is concluded that the building direction has more impact on the amount of grain boundary density than crystal orientation, which determined the oxidation resistance.

摘要

本研究旨在研究电子束熔炼制备的Inconel 718高温合金在圆柱形样品的构建方向与Z轴偏离0°、55°和90°时的高温氧化行为。在所有试样中均发现了具有择优晶体取向的柱状γ面心立方相。在700至1000°C的温度范围内，以最低晶界密度和最大晶粒尺寸为特征的0°样品表现出最佳的氧化性能。得出的结论是，构建方向对晶界密度的影响比晶体取向更大，而晶界密度决定了抗氧化性能。