Coating induced residual stress in nonoriented electrical steel laminations

2014 ◽  
Vol 29 (16) ◽  
pp. 1737-1746 ◽  
Author(s):  
Yaoyao Ding ◽  
Matthew Gallaugher ◽  
Nicolas Brodusch ◽  
Raynald Gauvin ◽  
Richard R. Chromik
Keyword(s):  
Residual Stress ◽  
Electrical Steel ◽  
Image Position

Abstract

scholarly journals Impact of residual stress evoked by pyramidal embossing on the magnetic material properties of non-oriented electrical steel

2021 ◽  
Author(s):  
Ines Gilch ◽  
Tobias Neuwirth ◽  
Benedikt Schauerte ◽  
Nora Leuning ◽  
Simon Sebold ◽  
...  
Keyword(s):  
Magnetic Material ◽  
Residual Stress ◽  
Magnetic Flux ◽  
Material Properties ◽  
Electrical Steel ◽  
Maximum Energy ◽  
Material Behavior ◽  
Electrical Machine ◽  
Element Analysis ◽  
Steel Sheets

AbstractTargeted magnetic flux guidance in the rotor cross section of rotational electrical machines is crucial for the machine’s efficiency. Cutouts in the electrical steel sheets are integrated in the rotor sheets for magnetic flux guidance. These cutouts create thin structures in the rotor sheets which limit the maximum achievable rotational speed under centrifugal forces and the maximum energy density of the rotating electrical machine. In this paper, embossing-induced residual stress, employing the magneto-mechanical Villari effect, is studied as an innovative and alternative flux barrier design with negligible mechanical material deterioration. The overall objective is to replace cutouts by embossings, increasing the mechanical strength of the rotor. The identification of suitable embossing geometries, distributions and methodologies for the local introduction of residual stress is a major challenge. This paper examines finely distributed pyramidal embossings and their effect on the magnetic material behavior. The study is based on simulation and measurements of specimen with a single line of twenty embossing points performed with different punch forces. The magnetic material behavior is analyzed using neutron grating interferometry and a single sheet tester. Numerical examinations using finite element analysis and microhardness measurements provide a more detailed understanding of the interaction of residual stress distribution and magnetic material properties. The results reveal that residual stress induced by embossing affects magnetic material properties. Process parameters can be applied to adjust the magnetic material deterioration and the effect of magnetic flux guidance.

Evaluation of nonequibiaxial residual stress using Knoop indenter

2011 ◽  
Vol 27 (1) ◽  
pp. 121-125 ◽  
Author(s):  
Min-Jae Choi ◽  
Seung-Kyun Kang ◽  
Ingeun Kang ◽  
Dongil Kwon
Keyword(s):  
Residual Stress ◽  
Image Position ◽  
Knoop Indenter

Abstract

The influence of residual stress on flux-barriers of non-oriented electrical steel

2020 ◽  
Vol 504 ◽  
pp. 166659
Author(s):  
B. Schauerte ◽  
N. Leuning ◽  
S. Vogt ◽  
I. Moll ◽  
H. Weiss ◽  
...  
Keyword(s):  
Residual Stress ◽  
Electrical Steel

scholarly journals Residual stress in electrodeposited nanocrystalline nickel-tungsten coatings

2012 ◽  
Vol 27 (9) ◽  
pp. 1271-1284 ◽  
Author(s):  
Tiffany D. Ziebell ◽  
Christopher A. Schuh
Keyword(s):  
Residual Stress ◽  
Nanocrystalline Nickel ◽  
Image Position ◽  
Nickel Tungsten

Abstract

Understanding processing parameters affecting residual stress in selective laser melting of Inconel 718 through numerical modeling

2019 ◽  
Vol 34 (08) ◽  
pp. 1395-1404 ◽  
Author(s):  
Jia Song ◽  
Liang Zhang ◽  
Wenheng Wu ◽  
Beibei He ◽  
Xiaoqing Ni ◽  
...  
Keyword(s):  
Residual Stress ◽  
Numerical Modeling ◽  
Selective Laser Melting ◽  
Inconel 718 ◽  
Processing Parameters ◽  
Laser Melting ◽  
Image Position

Abstract

A novel method for determining surface residual stress components and their directions in spherical indentation

2015 ◽  
Vol 30 (8) ◽  
pp. 1078-1089 ◽  
Author(s):  
Lei Shen ◽  
Yuming He ◽  
Dabiao Liu ◽  
Qiang Gong ◽  
Bo Zhang ◽  
...  
Keyword(s):  
Residual Stress ◽  
Spherical Indentation ◽  
Surface Residual Stress ◽  
Stress Components ◽  
Novel Method ◽  
Image Position

Abstract

scholarly journals Spherical indentation method for estimating equibiaxial residual stress and elastic–plastic properties of metals simultaneously

2018 ◽  
Vol 33 (8) ◽  
pp. 884-897 ◽  
Author(s):  
Guangjian Peng ◽  
Zhike Lu ◽  
Yi Ma ◽  
Yihui Feng ◽  
Yong Huan ◽  
...  
Keyword(s):  
Residual Stress ◽  
Spherical Indentation ◽  
Indentation Method ◽  
Plastic Properties ◽  
Elastic Plastic ◽  
Image Position

Abstract

Sign in / Sign up

Export Citation Format

Share Document