Effect of cryogenic burnishing on surface integrity modifications ofCo-Cr-Mobiomedical alloy

2012 ◽  
Vol 101B (1) ◽  
pp. 139-152 ◽  
Author(s):  
Shu Yang ◽  
Oscar W. Dillon ◽  
David A. Puleo ◽  
Ibrahim S. Jawahir
Keyword(s):  
Surface Integrity ◽  
Cryogenic Burnishing

scholarly journals Enhancing the Surface Integrity of Ti-6Al-4V Alloy through Cryogenic Burnishing

Procedia CIRP ◽  
2014 ◽  
Vol 13 ◽  
pp. 243-248 ◽  
Author(s):  
J. Caudill ◽  
B. Huang ◽  
C. Arvin ◽  
J. Schoop ◽  
K. Meyer ◽  
...  
Keyword(s):  
Surface Integrity ◽  
Cryogenic Burnishing

Surface layer modification by cryogenic burnishing of Al 7050-T7451 alloy with near ultra-fine grained structure

2021 ◽  
pp. 1-22
Author(s):  
Bo Huang ◽  
Yusuf Kaynak ◽  
Ying Sun ◽  
Marwan Khraisheh ◽  
I. S. Jawahir
Keyword(s):  
Surface Integrity ◽  
Surface Hardness ◽  
Grain Structure ◽  
Fine Grained ◽  
Compressive Stresses ◽  
Wear And Corrosion ◽  
Cryogenic Burnishing ◽  
Subsurface Layers ◽  
Fine Grained Structure ◽  
Wear And Corrosion Resistance

Abstract Burnishing has been increasingly utilized to improve the surface integrity of manufactured components. The generation of surface and subsurface layers with ultrafine grains, attributed to severe plastic deformation and dynamic recrystallization, leads to improved surface integrity characteristics including surface and subsurface hardness and reduction in surface roughness. Additionally, due to the generation of compressive stresses within the refined layers, increase in fatigue life and improved wear and corrosion resistance can be achieved. In this study, we apply cryogenic burnishing on Al 7050-T7451 discs and compare the surface integrity characteristics with dry conventional burnishing. A special roller burnishing tool with flexible rotating roller head was designed and used to perform the cryogenic burnishing experiments using liquid nitrogen as the coolant. The results show that cryogenic burnishing can increase the surface hardness by an average of 20-30% within a layer depth of 200 μm compared to only 5-10% increase using dry conventional burnishing. Refined layers with nano grain structure were also generated. During cryogenic burnishing the tangential burnishing forces were higher than those of dry conventional burnishing due to rapid cooling and work hardening of the material.

scholarly journals Influence of turning tool wear on the surface integrity and anti-fatigue behavior of Ti1023

2021 ◽  
Vol 13 (4) ◽  
pp. 168781402110112
Author(s):  
Li Xun ◽  
Wang Ziming ◽  
Yang Shenliang ◽  
Guo Zhiyuan ◽  
Zhou Yongxin ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Plastic Deformation ◽  
Titanium Alloy ◽  
Fatigue Life ◽  
Tool Wear ◽  
Surface Integrity ◽  
Low Cycle Fatigue ◽  
Fatigue Behavior ◽  
Machined Surface ◽  
Deformation Layer

Titanium alloy Ti1023 is a typical difficult-to-cut material. Tool wear is easy to occur in machining Ti1023, which has a significant negative effect on surface integrity. Turning is one of the common methods to machine Ti1023 parts and machined surface integrity has a direct influence on the fatigue life of parts. To control surface integrity and improve anti-fatigue behavior of Ti1023 parts, it has an important significance to study the influence of tool wear on the surface integrity and fatigue life of Ti1023 in turning. Therefore, the effect of tool wear on the surface roughness, microhardness, residual stress, and plastic deformation layer of Ti1023 workpieces by turning and low-cycle fatigue tests were studied. Meanwhile, the influence mechanism of surface integrity on anti-fatigue behavior also was analyzed. The experimental results show that the change of surface roughness caused by worn tools has the most influence on anti-fatigue behavior when the tool wear VB is from 0.05 to 0.25 mm. On the other hand, the plastic deformation layer on the machined surface could properly improve the anti-fatigue behavior of specimens that were proved in the experiments. However, the higher surface roughness and significant surface defects on surface machined utilizing the worn tool with VB = 0.30 mm, which leads the anti-fatigue behavior of specimens to decrease sharply. Therefore, to ensure the anti-fatigue behavior of parts, the value of turning tool wear VB must be rigorously controlled under 0.30 mm during finishing machining of titanium alloy Ti1023.

scholarly journals Environmentally sustainable cooling strategies in milling of SA516: Effects on surface integrity of dry, flood and MQL machining

2021 ◽  
Vol 288 ◽  
pp. 125580
Author(s):  
Adam Race ◽  
Iwona Zwierzak ◽  
Jack Secker ◽  
Jonathan Walsh ◽  
Julia Carrell ◽  
...  
Keyword(s):  
Surface Integrity ◽  
Environmentally Sustainable ◽  
Cooling Strategies
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