Residual Stress Measurement of Laser-Engineered Net Shaping AISI 410 Thin Plates Using Neutron Diffraction

被引：46

作者：

Pratt, P. ^{[1
]}

Felicelli, S. D. ^{[1
,2
]}

Wang, L. ^{[2
]}

Hubbard, C. R. ^{[3
]}

机构：

[1] Mississippi State Univ, Dept Mech Engn, Mississippi State, MS 39762 USA

[2] Mississippi State Univ, Ctr Adv Vehicular Syst, Mississippi State, MS 39762 USA

[3] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2008年 / 39A卷 / 13期

关键词：

Residual Stress; Travel Speed; Stress Profile; Gage Volume; Thermomechanical Model;

D O I：

10.1007/s11661-008-9660-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In an attempt to relate the laser-engineered net shaping (LENS) process parameters, laser power and laser travel speed, to the quality of LENS-produced parts, strain measurements were taken at several predetermined points within seven LENS AISI 410 thin plates using the neutron diffraction method. The residual stresses at these points were then calculated using the measured strain values to ascertain how the internal stress varies as a function of the input parameters and location. It is found that the component of the stress in the vertical direction (i.e., perpendicular to the raster direction of the laser/powder nozzle) is dominant, in agreement with previous reports, and relatively insensitive to variations in process parameters. This was confirmed with numerical simulations performed with a thermomechanical model developed using the commercial program SYSWELD. The simulations also showed a good qualitative agreement with the measured simulated stresses.

引用

页码：3155 / 3163

页数：9

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