Machined surface integrity of inconel 718 in high-speed dry milling using SiAlON ceramic tools

2021 ◽  
Author(s):  
Farhad Molaiekiya ◽  
Ali Aliakbari Khoei ◽  
Maryam Aramesh ◽  
Stephen C. Veldhuis
Keyword(s):  
Surface Integrity ◽  
Inconel 718 ◽  
High Speed ◽  
Dry Milling ◽  
Machined Surface ◽  
Ceramic Tools ◽  
Sialon Ceramic ◽  
Machined Surface Integrity

Effect of Cutting Speed on Surface Integrity in High Speed Machining Nickel-Based Superalloy Inconel 718

2011 ◽  
Vol 697-698 ◽  
pp. 208-212
Author(s):  
Zhan Qiang Liu ◽  
Cheng Ming Cao ◽  
J. Du ◽  
Zhen Yu Shi
Keyword(s):  
Surface Roughness ◽  
Surface Integrity ◽  
Inconel 718 ◽  
High Speed ◽  
Cutting Speed ◽  
Cnc Machining ◽  
Machined Surface ◽  
Surface Residual Stresses ◽  
Machined Surface Integrity ◽  
Cutting Speeds

Surface integrity is becoming important to satisfy the increasing requirements service life of machined parts. The purpose of this study is to investigate the effects of cutting speeds on surface integrity of Inconel 718. Experiments are conducted on a CNC machining center under various cutting speeds. The machined surface integrity is evaluated in terms of surface roughness, microhardness and residual stress. Experimental results show that machined surface integrity of Inconel 718 is sensitivity to the variations of cutting speeds. The surface roughness firstly increases with the cutting speeds increasing at the range from 50 m/min to 200 m/min, then decreases with the further increasing of the cutting speeds. For microhardness, it can be seen that work-hardening for the machined surface is serious. The surface residual stresses are tensile ones at the range of the selected cutting speeds from 50 m/min to 3,000 m/min in this research.

scholarly journals Effects of Machined Surface Integrity on High-Temperature Low-Cycle Fatigue Life and Process Parameters Optimization of Turning Superalloy Inconel 718

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2428
Author(s):  
Xiaoping Ren ◽  
Zhanqiang Liu ◽  
Xiaoliang Liang ◽  
Pengcheng Cui
Keyword(s):  
Residual Stress ◽  
High Temperature ◽  
Fatigue Life ◽  
Process Parameters ◽  
Surface Integrity ◽  
Inconel 718 ◽  
Low Cycle Fatigue ◽  
Cycle Fatigue ◽  
Machined Surface ◽  
Machined Surface Integrity

Machined surface integrity characteristics, including surface stresses, physical-mechanical properties and metallographic structures, play important roles in the fatigue performance of machined components. This work aimed at investigating the effects of machined surface integrity on high-temperature low-cycle fatigue life. The process parameters were optimized to obtain required surface integrity and fatigue life of the turning superalloy Inconel 718. The relationships between low-cycle fatigue life and machined surface integrity characterization parameters were established based on the low-cycle fatigue tests at a high temperature (650 °C). The sensitivities of turning process parameters to high-temperature low-cycle fatigue life were analyzed, and the optimization parameters were proposed with the goal of antifatigue manufacturing. Experimental results indicated that the impact order of the characterization parameters of machined surface integrity on the high-temperature low-cycle fatigue life were the degree of work hardening RHV, the residual stress in the cutting speed direction S22, the fatigue stress concentration factor Kf, the degree of grain refinement RD and the residual stress in the feed direction S33. In the range of turning parameters of the experiments in this research, the cutting speeds could be 80~110 m/min, and the feed rate could be 0.10~0.12 mm/rev to achieve a longer high-temperature low-cycle fatigue life. The results can be used for guiding the fatigue-resistant manufacturing research of aeroengine superalloy turbine disks.

scholarly journals Effects of Tool Wear on Machined Surface Integrity During Milling of Inconel 718

2021 ◽  
Author(s):  
Liang Tan ◽  
Changfeng Yao ◽  
Dinghua Zhang ◽  
Minchao Cui ◽  
Xuehong Shen
Keyword(s):  
Residual Stress ◽  
Surface Roughness ◽  
Tool Wear ◽  
Surface Integrity ◽  
Inconel 718 ◽  
Flank Wear ◽  
Cutting Temperature ◽  
Machined Surface ◽  
Tool Flank Wear ◽  
Machined Surface Integrity

Abstract This paper investigates the effects of tool wear on the machined surface integrity characteristics, including the surface roughness, surface topography, residual stress, microhardness and microstructure, during ball-end milling of Inconel 718. Tool wear, tool lifetime, and cutting force are measured. In addition, a two-dimensional finite element-based model is developed to investigate the cutting temperature distribution in the chip–tool–workpiece contact area. Results show that the ball nose end mill achieves tool lifetime of approximately 350 min. The cutting forces increase sharply with a greater tool flank wear width, while the highest cutting temperature has a decreasing tend at a flank wear width of 0.3 mm. Higher tool flank wear width produces larger surface roughness and deteriorative surface topography. A high-amplitude (approximately −700 MPa) and deep layer (approximately 120 mm) of compressive residual stress are induced by a worn tool with 0.3 mm flank wear width. The surface microhardness induced by new tool is larger than that induced by worn tool. Plastic deformation and strain streamlines are observed within 10 mm depth beneath the surface. The results in this paper provide an optimal tool wear criterion which integrates the surface integrity requirements and the tool lifetime for ball-end finish milling of Inconel 718.

A comparison between whisker-reinforced alumina and SiAlON ceramic tools in high-speed face milling of Inconel 718

2013 ◽  
Vol 228 (8) ◽  
pp. 845-857 ◽  
Author(s):  
Xianhua Tian ◽  
Jun Zhao ◽  
Ying Dong ◽  
Ningbo Zhu ◽  
Jiabang Zhao ◽  
...  
Keyword(s):  
Inconel 718 ◽  
High Speed ◽  
Face Milling ◽  
Ceramic Tools ◽  
Sialon Ceramic
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