The Impact of Tool Material and Cutting Parameters on Surface Roughness of a Nickel-Base Superalloy

1997 ◽  
Vol 12 (6) ◽  
pp. 1017-1035
Author(s):  
S. M. Darwish
Keyword(s):  
Surface Roughness ◽  
Tool Material ◽  
Cutting Parameters ◽  
Nickel Base Superalloy ◽  
Nickel Base ◽  
The Impact ◽  
Base Superalloy

Experimental Study on Cutting Force in Machining Nickel Base Superalloy

2010 ◽  
Vol 455 ◽  
pp. 379-382
Author(s):  
X.Y. Wang ◽  
S.Q. Pang ◽  
Q.X. Yu
Keyword(s):  
Cutting Force ◽  
Elevated Temperatures ◽  
High Strength ◽  
Cutting Parameters ◽  
Advanced Materials ◽  
Nickel Base Superalloy ◽  
Nickel Based Superalloy ◽  
Actual Production ◽  
Nickel Base ◽  
Base Superalloy

Studies on cutting force lead an extremely important guiding significance in the actual producing. Nickel base superalloy is widely in the manufacture of components for some important industrial areas, because of their ability to retain high-strength at elevated temperatures. It possesses excellent performance as a class of advanced materials. Because of its very poor machinability, the study on cutting force in machining nickel-based superalloy in the actual production or scientific research is relatively less. In this paper, Author aim at two kinds of typical difficult-to-machining materials nickel base superalloy (GH4169, K24). Contrasting with other typical materials ,such as 45# steel and high strength steel 35CrMnSi，study the law of cutting force effected by cutting parameters under the conditions of turning . Intuitive analysis of cutting force changes with the cutting parameters, as well as these characteristics on three-axis force of each type of material, that is to improve its processability and to provide guidance to actual production has a positive significance.

High Temperature Oxidation Behavior of CM-247LC Nickel Base Superalloy

2014 ◽  
Vol 922 ◽  
pp. 61-66 ◽  
Author(s):  
Mau Sheng Chiou ◽  
An Chou Yeh ◽  
Sheng Rui Jian ◽  
Chen Ming Kuo
Keyword(s):  
High Temperature ◽  
High Temperature Oxidation ◽  
Oxidation Behavior ◽  
Nickel Base Superalloy ◽  
Temperature Oxidation ◽  
Gamma Prime ◽  
High Temperature Oxidation Behavior ◽  
Nickel Base ◽  
The Impact ◽  
Base Superalloy

The effects of Aluminum addition on the oxidation behavior of CM-247LC Nickel base superalloy were investigated under high temperature isothermal oxidation test at 1000°C in the dry air. In this study, we explored the difference and observed the micro-structure of oxides, gamma matrix as well as gamma prime precipitate, and further studied the impact of high temperature oxidation behavior and phase stability analysis. Results showed that by adding small amount of Al in CM-247LC superalloy, protective oxides could form more easily, and a more regular morphology of gamma prime in the base material microstructure could be retained, which in-directly reduced the rate of outward diffusion and prevented further oxidation.

Test Study of Nickel-Base Superalloy 718 Superfine Deep-Hole Drilling

2012 ◽  
Vol 217-219 ◽  
pp. 1825-1828
Author(s):  
Zhan Feng Liu ◽  
Sheng Ming He
Keyword(s):  
Cutting Parameters ◽  
Hole Drilling ◽  
Tool Geometry ◽  
Nickel Base Superalloy ◽  
Deep Hole ◽  
Test Study ◽  
Nickel Base ◽  
Wear Tool ◽  
Hole Axis ◽  
Base Superalloy

Nickel-base superalloy 718 is a new kind of materials that is difficult to drilling. In this paper, the superfine deep-hole (ø36×5440mm)drilling test is based on the material. This paper analyzes the causes and laws of the tool wear , tool breakage ,and the hole axis deflection from the blade material, tool geometry parameters, cutting parameters and drilling methods.

Experimental Study on Thermostatic Cutting Nickel-Base Superalloy GH4169

2010 ◽  
Vol 136 ◽  
pp. 293-297
Author(s):  
Zhao Peng Hao ◽  
R.D. Han ◽  
D. Gao
Keyword(s):  
Cutting Temperature ◽  
Cutting Speed ◽  
High Strength ◽  
Cutting Parameters ◽  
Nickel Base Superalloy ◽  
Processing Efficiency ◽  
Workpiece Material ◽  
Cutting Method ◽  
Nickel Base ◽  
Base Superalloy

Nickel-base super alloy GH4169 is difficult to cutting and tool wear is very serious, because of its high strength, poor thermal conductivity, and serious work-hardening. In order to choose reasonable cutting parameters as to improve the processing efficiency, the cutting experiments were crarried out and the changes of workpiece material physical in cutting process were studied, and then thermostatic cutting method based on the longest distance is proposed in this paper. The best cutting temperature of carbide cutting tool YG8-GH4169 has been given. The experiments using diferent cutting parameters has proved the feasibility of thermostatic cutting method. Finally, the empirical formula of thermostatic cutting based on the cutting speed and feed rate is proposed, when using YG8 cutting GH4169.

Fatigue Behaviors of a NiCrAlYSi Coated Directionally Solidified Nickel Base Superalloy

2008 ◽  
Vol 33-37 ◽  
pp. 229-236
Author(s):  
Hui Chen Yu ◽  
Bin Zhong ◽  
Xue Ren Wu ◽  
Hui Ji Shi
Keyword(s):  
Surface Roughness ◽  
Crack Initiation ◽  
Low Cycle Fatigue ◽  
Testing Machine ◽  
Strain Range ◽  
Nickel Base Superalloy ◽  
Directionally Solidified ◽  
Nickel Base ◽  
Base Superalloy

The fatigue behaviors of a directionally solidified (DS) nickel base superalloy, coated with a MCrAlY coating (NiCrAlYSi) were studied. Two kinds of tests were performed. One kind of tests are low cycle fatigue (LCF) test under strain control at different temperatures, another kind of tests are stress controlled LCF test with SEM-servo hydraulic testing machine for in situ cracking observation. The results show that the effect of coating on LCF life of coating/substrate system was rather different according to different strain levels and temperatures. The coating has no or less effect on LCF life under high strain range and the LCF life is governed by fatigue behavior of substrate in spite of the difference of temperature. However, when strain range is smaller, crack initiation and propagation are observably affected by temperature, which leads to a shorter LCF life of coating/substrate system at 500°C and a longer LCF life at 760°C or 980°C. This means the failure of coating/substrate system is dominated by the cracking of surface coating under low strain range. The brittleness at 500°C lower than DBTT results in rapid stage II crack propagation. The crack initiation from coating surface was in situ observed at room temperature and 700 °C and it was found that cracks usually initiated from the surface roughness of coating and then propagate to failure. The brittleness and surface roughness are the basic acceptable causes leading to the early damage of a coating/substrate system.

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