Investigation on surface residual stress distribution and evaluation of engineering ceramics in rotary ultrasonic grinding machining

2016 ◽  
Vol 231 (15) ◽  
pp. 2773-2782 ◽  
Author(s):  
SL Wei ◽  
H Zhao ◽  
JT Jing ◽  
FH Yun ◽  
XL Li
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Stress Tolerance ◽  
Surface Integrity ◽  
Residual Stress Distribution ◽  
Distribution Model ◽  
Surface Residual Stress ◽  
Machined Surface ◽  
Engineering Ceramics ◽  
Ultrasonic Grinding

Residual stress of engineering ceramics is one of surface integrity evaluation indexes affecting the parts’ strength properties. Rotary ultrasonic grinding machining is the most powerful machining method for engineering ceramics with better surface integrity. The residual stress field distribution is changed due to micro cracks which are inevitable in the process. A residual stress distribution model of machined surface micro crack tip has been established in the paper. And the experimental results enable us to obtain surface residual stress distribution of engineering ceramics in rotary ultrasonic grinding machining. Then, we propose an evaluation parameter called confidence stress tolerance to evaluate surface residual stress characteristic. Preliminary results indicate that surface residual stress distribution is in line with the normal distribution. Confidence stress tolerance is an effective parameter to improve the evaluation reliability. Furthermore, precision and affecting factors of confidence stress tolerance evaluation have also been investigated.

The Cutting Residual Stress Included in the Surface Integrity

2014 ◽  
Vol 893 ◽  
pp. 638-643
Author(s):  
Juan Huang ◽  
Gui Cheng Wang
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Surface Integrity ◽  
Cutting Parameters ◽  
Residual Stress Distribution ◽  
Distribution Law ◽  
Surface Residual Stress ◽  
Machined Surface ◽  
Cutting Surface ◽  
Experimental Researches

This article is for the integrity of the cutting surface, explaining the reason for the cutting residual stress generated from the mechanism, proposed several typical methods to reduce the residual stress. According to some experimental researches on cutting parameters which have been done by previous scholars, this article gives some analysis of the effects of cutting parameters of residual stress. And preliminary summary of the influence of residual stress on cutting parameters, it also provides a way for further discussion of cutting parameters and material effect on the machined surface residual stress distribution law.

Residual Stress Distribution in Machining Annealed 18 Percent Nickel Maraging Steel

1986 ◽  
Vol 108 (2) ◽  
pp. 93-98 ◽  
Author(s):  
Shaik Jeelani ◽  
J. A. Bailey
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Maraging Steel ◽  
Cutting Speed ◽  
Residual Stress Distribution ◽  
Surface Residual Stress ◽  
Machined Surface ◽  
Etching Technique ◽  
Near Surface ◽  
Percent Nickel

A novel electrolytic etching technique is used to determine the residual stress distribution in the machining of annealed 18 percent nickel maraging steel. Ring shaped specimens were machined under unlubricated orthogonal conditions with carbide cutting tools having wear lands of 0.125, 0.25, and 0.5 mm length at cutting speeds ranging between 0.05 and 1.60 ms−1. The results of the investigation show that the residual stresses are tensile at the machined surface and decrease with an increase in depth beneath the machined surface. The maximum (near surface) residual stress and depth of the severely stressed region increase with an increase in cutting speed and tool wear land length. The results are interpreted in terms of the variations in the amount of surface region deformation produced by changes in cutting conditions.

Simulation of the Cryogenic Machining for Improved Energy Efficiency and Surface Integrity

2014 ◽  
Author(s):  
Jingxing Qian ◽  
Jing Tao ◽  
Suiran Yu
Keyword(s):  
Residual Stress ◽  
Energy Efficiency ◽  
Stress Distribution ◽  
Surface Integrity ◽  
Residual Stress Distribution ◽  
Production Costs ◽  
Cutting Process ◽  
Cutting Condition ◽  
Cryogenic Machining ◽  
Machined Surface

Idea of global sustainable development dictates greener machining processes. Cryogenic machining technologies enable cleaner, more energy efficient and less health hazardous process with possible lower production costs and higher productivity. In this paper, a 2D orthogonal cryogenic cutting process simulation model to predict the thermo-mechanical fields and the residual stress distribution remains in the machined surface of AZ31B magnesium alloy has been developed using ABAQUS FEM software. The proposed model can be applied to analyze influence of cutting condition parameters on the cutting forces and on the residual stress distribution in the machined surface and subsurface, which is a critical issue concerning energy efficiency and surface integrity of a cutting process.

Study of Surface Residual Stress in Hard Turning of Die Steel Cr12MoV

2013 ◽  
Vol 589-590 ◽  
pp. 33-37
Author(s):  
Cai Xu Yue ◽  
Xian Li Liu ◽  
Jing Ma ◽  
Xue Liu ◽  
Guang Xu Ren
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Compressive Stress ◽  
Cutting Parameters ◽  
Residual Stress Distribution ◽  
Surface Residual Stress ◽  
Machined Surface ◽  
Residual Surface Stress ◽  
Hard State ◽  
Object Of Study

After hard cutting process, processed surface residual stress distribution state has a significantly effect on life of parts. In this paper, typical mold steel Cr12moV as the object of study, after the hard state processing in different cutting parameters and tool parameters, effects of different cutting parameters and tool parameters on surface residual stress and residual stress affected layer. Results showed that different cutting parameters and tool parameters can make different tensile stress distributing on surface, and the residual surface stress is can also be compressive stress. Through the experiment can be found with greater speed, cutting tool wear is bigger, the machined surface residual compressive stress and affected layer depth and when the tool flank wear is greater than 0.3mm, also the surface residual stress distribution curve downward obviously. The research results provide reference for optimization of processing conditions.

Abrasive Waterjet Peening With Elastic Prestress: Subsurface Residual Stress Distribution

2007 ◽  
Author(s):  
Balaji Sadasivam ◽  
Alpay Hizal ◽  
Dwayne Arola
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Stress Field ◽  
Yield Strength ◽  
Residual Stresses ◽  
Residual Stress Distribution ◽  
Abrasive Waterjet ◽  
Residual Stress Field ◽  
Surface Residual Stress ◽  
Compressive Residual Stresses

Recent advances in abrasive waterjet (AWJ) technology have resulted in new processes for surface treatment that are capable of introducing compressive residual stresses with simultaneous changes in the surface texture. While the surface residual stress resulting from AWJ peening has been examined, the subsurface residual stress field resulting from this process has not been evaluated. In the present investigation, the subsurface residual stress distribution resulting from AWJ peening of Ti6Al4V and ASTM A228 steel were studied. Treatments were conducted with the targets subjected to an elastic prestress ranging from 0 to 75% of the substrate yield strength. The surface residual stress ranged from 680 to 1487 MPa for Ti6Al4V and 720 to 1554 MPa for ASTM A228 steel; the depth ranged from 265 to 370 μm for Ti6Al4V and 550 to 680 μm for ASTM A228 steel. Results showed that elastic prestress may be used to increase the surface residual stress in AWJ peened components by up to 100%.

Studies on the Residual Stress Distribution for 2A02 Aluminum Forgings

2014 ◽  
Vol 529 ◽  
pp. 62-70
Author(s):  
Jiang Cao ◽  
Chun Fu Li ◽  
Yan Wang ◽  
Shuang Fang
Keyword(s):  
Heat Treatment ◽  
Residual Stress ◽  
Finite Element ◽  
Stress Distribution ◽  
Residual Stress Distribution ◽  
Surface Residual Stress ◽  
Indentation Method ◽  
Absolute Value ◽  
The Absolute ◽  
Micro Indentation

High strength aluminum alloys which improve mechanical properties through heat treatment have been widely used in aviation manufacturing. However, residual stresses that are harmful to the materials are brought in during the heat treatment process. By means of the analysis of micro-indentation method and ANSYS finite element method, the residual stress distribution in 2A02aluminum forgings after water quenching were systematically investigated, mainly considering two factors of the symmetry of structure and the variation of surface constraint. The results of micro-indentation method show that the absolute value of the residual stress within the sample tends to decrease as the condition of constraint increase at the location of the same thickness; the absolute value of the surface residual stress also tends to decrease as the thickness of the sample increase with the same constraint conditions, the absolute value of the residual stress in the symmetrical sample is lower than that in the asymmetrical sample. The results of finite element simulation are as follows: for 2A02 aluminum alloy, the stress field distribution during the process of quenching is mainly influenced by the thickness of the samples. After the quenching process, the stress state at the components surface are controlled by compressive stress in the direction of both thickness and width, while the residual stress within the samples is dominated by tensile stress.

scholarly journals Effects of Hard Shot Peening with Water Jet on Surface Residual Stress Distribution of Carburized Steels

1994 ◽  
Vol 80 (2) ◽  
pp. 131-136 ◽  
Author(s):  
Takayoshi ISHIGURO ◽  
Toshiharu SHIMAZAKI ◽  
Kiyoshi TERAYAMA ◽  
Akio YONEGUCHI
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Shot Peening ◽  
Water Jet ◽  
Residual Stress Distribution ◽  
Surface Residual Stress

Surface Integrity of Die Material in High Speed Hard Machining, Part 2: Microhardness Variations and Residual Stresses

1999 ◽  
Vol 122 (4) ◽  
pp. 632-641 ◽  
Author(s):  
T. I. El-Wardany ◽  
H. A. Kishawy ◽  
M. A. Elbestawi
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Stress Distribution ◽  
Residual Stresses ◽  
High Speed ◽  
Residual Stress Distribution ◽  
Depth Of Cut ◽  
Hard Machining ◽  
Machined Surface ◽  
Workpiece Surface

The main objective of this paper is to investigate the quality and integrity of the surface produced during high speed hard machining (HSHM) of D2 tool steel in its hardened state (60–62 HRc). Polycrystalline Cubic Boron Nitride (PCBN) tools are used in this study. The results obtained from the micro-graphical analysis of the surface produced are presented in Part 1 of this paper. In Part 2 micro-hardness and residual stress analyses are presented. Microhardness measurements are conducted beneath the machined surface. X-ray diffraction analysis is performed to obtain the residual stress distribution beneath the surface. Analytically, a 3-D thermo-elasto-plastic finite element model is developed to predict the residual stresses induced in the workpiece surface. In the model the cutting zone is specified based on the tool condition (i.e., sharp or worn). The finite element analysis demonstrates the significant effect of the heat generated during cutting on the residual stress distribution. The results illustrate the possibility of minimizing the high tensile residual stresses produced in the workpiece surface, by selecting the appropriate depth of cut. A good correlation between the analytical and predicted residual stress is obtained. [S1087-1357(00)00804-2]

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