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.

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 Impact on the Residual Stress Distribution in Continuous Hard Turning GCr15

2014 ◽  
Vol 800-801 ◽  
pp. 596-600
Author(s):  
Kai Li ◽  
Tao Chen ◽  
Su Yan Li ◽  
Xiao Ting Wang ◽  
Tao Liu
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Hard Turning ◽  
Cutting Speed ◽  
Residual Stress Distribution ◽  
Residual Tensile Stress ◽  
Surface Residual Stress ◽  
Simulation Results ◽  
Experimental Values ◽  
The Impact

In this paper, we use the finite element simulation method to create a three-dimensional thermal mechanical coupled model that simulate the distribution of residual stress under condition of hard turning GCr15. And twice consecutive cutting simulation are required, then analysised the influence rule of two consecutive machining on surface residual stress distribution. The simulation results were compared with the experimental values, the results show that the simulated values of continuous cutting was very closed to the experimental values and the simulation results showed a certain reliability, the maximum residual tensile stress value increased significantly as the cutting speed increased.

Experimental and FEM Analysis of Cutting Sequence on Residual Stresses in Machined Layers of AISI 316L Steel

2006 ◽  
Vol 524-525 ◽  
pp. 179-184 ◽  
Author(s):  
J.C. Outeiro ◽  
Domenico Umbrello ◽  
Rachid M'Saoubi
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Residual Stresses ◽  
Cutting Speed ◽  
Residual Stress Distribution ◽  
Depth Of Cut ◽  
Aisi 316L ◽  
Machined Surface ◽  
316L Steel ◽  
Cutting Sequence

The reliability of a mechanical component depends to a large extent on the physical state of its surface layers. This state includes the distribution of residual stresses induced by machining. Residual stresses in the machined surface and subsurface are affected by the cutting tool, work material, contact conditions on the interfaces, cutting regime parameters (cutting speed, feed and depth of cut), but also depends on the cutting procedure. In this paper, the effects of cutting sequence on the residual stress distribution in the machined surface of AISI 316L steel are experimentally and numerically investigated. In the former case, the X-ray diffraction technique is applied, while in the latter an elastic-viscoplastic FEM formulation is implemented. The results show that sequential cut tends to increase superficial residual stresses. A greater variation in residual stresses is observed between the first and the second cut. Moreover, an increase in the thickness of the tensile layer is also observed with the number of cuts, this difference also being greater between the first and the second cut. Based on these results, the residual stress distribution on the affected machined layers can be controlled by optimizing the cutting sequence.

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.

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.

Effect of Milling Speed and Feed on Surface Residual Stress of 7050-T7451 Aluminum Alloy

2012 ◽  
Vol 499 ◽  
pp. 217-222 ◽  
Author(s):  
C. Li ◽  
Yi Wan ◽  
R.R. Zhang ◽  
Zhan Qiang Liu
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Cutting Speed ◽  
Diffraction Method ◽  
Cutting Condition ◽  
Feed Speed ◽  
X Ray Diffraction ◽  
Surface Residual Stress ◽  
Orthogonal Direction ◽  
Machined Surface

The residual stress in the milling of 7050-T7451 aluminum alloy was measured using X-ray diffraction method in which Psi-oscillation, Phi-oscillation and peak fit were adopted. Cutting speed and feed are main variables which were considered in this study. The results show that compressive residual stresses are generated in surface for the down milling generally, which is mainly due to burnishing effect between the tools flank face and the machined surface. In feed and its orthogonal direction, the effect of cutting speed and feed speed on residual stress is similar. Therefore, required residual stress can be achieved by controlling the cutting condition such as cutting speed, feed speed etc.

Measurement of Residual Stresses within a PWR Swaged Heater Tube

2011 ◽  
Vol 70 ◽  
pp. 279-284 ◽  
Author(s):  
D.M. Goudar ◽  
Ed J. Kingston ◽  
Mike C. Smith ◽  
Sayeed Hossain
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Stress Measurement ◽  
Measurement Techniques ◽  
Residual Stress Distribution ◽  
Hole Drilling ◽  
Shear Stresses ◽  
Outer Diameter ◽  
Near Surface ◽  
Heater Tube

Frequent failures of the pressuriser heater tubes used in Pressurised Water Reactors (PWRs) have been found. Axial cracks initiating from the tube outer diameter have been detected in some tubes as well as the resulting electrical problems. Replacement of the heater tubes requires an undesirably prolonged plant shutdown. In order to better understand these failures a series of residual stress measurements were carried out to obtain the near surface and through-thickness residual stress profiles in a stainless steel pressuriser heater tube. Three different residual stress measurement techniques were employed namely, Deep-Hole Drilling (DHD), Incremental Centre Hole Drilling (ICHD) and Sachs’ Boring (SB) to measure the through thickness residual stress distribution in the heater tubes. Results showed that the hoop stresses measured using all three techniques were predominantly tensile at all locations, while the axial stresses were found to be tensile at the surface and both tensile and compressive as they reduce to small magnitudes within the tube. The magnitude of the in-plane shear stresses was small at all measurement depths at all locations. The various measurement methods were found to complement each other well. All the measurements revealed a characteristic profile for the through-thickness residual stress distribution.

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