Residual Stress Analysis Within Steel Encapsulated Metal Matrix Composites Via Neutron Diffraction
Abstract
Neutron diffraction measurements were performed on steel encapsulated metal matrix composites (MMCs) in order to quantify bulk residual stresses. A coefficient of thermal expansion (CTE) mismatch induced residual compressive stress method is utilized as a means of improving the ductility of the MMCs and overall efficiency of several macro hybridized materials systems. Systems consisting of an A36, 304 stainless steel, or Nitronic® 50 stainless steel shell filled with an Al-SiC or Al-Al2O3 metal matrix composite are evaluated in this work. Upon cooling from processing temperatures residual strains are generated due to a CTE mismatch between each of the phases: steel, aluminum, and reinforcement. The analysis shows variation in the measured strain and stress results due to outer steel thickness, difference in CTE between materials, and relative position within the composite.
Keywords
Encapsulation Metal matrix composite Neutron diffractionReferences
- 1.Aghajanian M et al (2013) Processing of hybrid structures consisting of Al-based metal matrix composites (MMCs) with metallic reinforcement of steel or titanium. In: TMS2013 annual meeting supplemental proceedings, Wiley, Hoboken, NJ, pp 629–638Google Scholar
- 2.Karandikar PG et al (2013) Al/Al2O3 MMCs and macrocomposites for armor applications. Ceram Eng Sci Proc 34(5):63–74CrossRefGoogle Scholar
- 3.Karandikar PG et al (2013) Net shape Al/B4C metal matrix composites (MMCs) for high specific stiffness and neutron absorption applications. In TMS 2013 annual meeting supplemental proceedings, Wiley, Hoboken, NJ, pp 683–689Google Scholar
- 4.Givens B et al (2009) Effect of particle loading on the properties of Al/SiC metal matrix composites. In: Yin et al (eds) Aluminum alloys: fabrication, characterization and applications II, TMS, Warrendale, PA, pp 197–202Google Scholar
- 5.Karandikar P et al Metal encapsulated MMC macrocomposites. Materials science & technology 2014 conference proceedingsGoogle Scholar
- 6.Fudger S et al (2015) Mechanical properties of steel encapsulated metal matrix composites. Advanced composites for aerospace. Wiley, New York, pp 121–36 (Print)Google Scholar
- 7.Fitzpatrick ME, Hutchings MT, Withers PJ (1997) Separation of macroscopic, elastic mismatch and thermal expansion misfit stresses in metal matrix composite quenched plates from neutron diffraction measurements. Acta Mater 45(12):4867–4876CrossRefGoogle Scholar
- 8.Holden TM (2013) Chapter 8 neutron diffraction. Practical residual stress measurement methods, Wiley (Print)Google Scholar
- 9.Non-destructive testing—stand test method for determining residual stresses by neutron diffraction. 1st edn. N.p.: ISO 21432, 205 (Print)Google Scholar
- 10.Bruno G, Girardin E, Giuliani A, Manescu A, Rustichello F, O’donnel B, McHugh PE (2002) Residual stress analysis in aerospace MMC materials by neutron diffraction. Appl Phys A Mater Sci Process 74(1):s1701–s1703Google Scholar
- 11.Levy-Tubiana R et al (2003) Relaxation of thermal mismatch stress due to plastic deformation in an Al/SiCp metal matrix composite. Mater Sci Eng A 341(1):74–86Google Scholar
- 12.Bruno G et al (2006) Gauge volume effects in residual stress determination by neutron diffraction: the strength differential effect in metal matrix composites. Mater Sci Eng A 437(1):100–108Google Scholar
- 13.