Zinc-induced embrittlement in nickel-base superalloys by simulation and experiment

被引：3
作者：
Otis, Richard [1 ]
Waje, Mahesh [2 ]
Lindwall, Greta [1 ]
Jefferson, Tiffany [2 ]
Lange, Jeremy [2 ]
Liu, Zi-Kui [1 ]
机构：
[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[2] Lynntech Inc, College Stn, TX USA
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2017年 / 97卷 / 09期
关键词：
Zinc; superalloys; embrittlement; ball-milling; CALPHAD; NI-ZN ALLOYS; THERMODYNAMIC PROPERTIES; DIFFUSION; PHASES; SYSTEM;
D O I：
10.1080/09500839.2017.1356478
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The high cost of Re has driven interest in processes for recovering Re from scrap superalloy parts. In this work thermodynamic modelling is used to study Zn-induced embrittlement of a superalloy and to direct experiments. Treating superalloy powder with Zn vapour reduces the average particle size after milling from approximately 130 mu m to 0.5-10 mu m, vs. 100 mu m for untreated powder. Simulations predict the required treatment time to increase with temperature. Agreement between predictions and experiments suggests that an embrittling liquid forms in less than an hour of Zn vapour treatment between 950-1000 degrees C and partial pressures of Zn between 14-34 kPa (2-5 psi).
引用
收藏
页码：335 / 342
页数：8
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