Abstract
Pure iron (Armco-iron) was borided. A 100 μm thick surface layer consists of FeB at the immediate surface and Fe 2B in deeper regions, followed by a diffusion layer. X-ray stress analysis proves to be an appropriate method to determine the residual stresses non-destructively. At the surface a residual compressive stress of 600 MPa is found. Its variation with depth below the surface is determined.
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