Qualification of friction stir processing for production applications
- Nelson T. ,
- Sorensen C. ,
- Packer S. ,
- et al
- Nelson T. ,
- Sorensen C. ,
- Packer S. and
- Allen C.
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A friction stir processing (FSP) technique was employed to fabricate D2 steel hunting knife blades with long-life cutting edge retention, and blade integrity tests were undertaken. The FSP tool design was a convex scroll shoulder step spiral and the material used was an MS-80 grade of polycrystalline BN. The steel grade studied was a D2 tool steel (1.4-1.6%C, 11-13%Cr, 0.7-1.2%Mo). Microstructural and morphological features were examined as a function of FSP parameters. Knife blades were evaluated by hardness, toughness, bending, corrosion and edge retention tests. Repeatability issues are discussed in relation to process control variables, hardness mapping and the achievement of steady state conditions.
7th International Symposium, 20-22 May 2008, 9B: Steel 3, Paper 02
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