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The Effects of Ball Burnishing for Aerospace Blade Material 17-4 PH Steel

Abstract Details

2013, Master of Science, University of Toledo, Mechanical Engineering.
Ball burnishing has been investigated to improve surface integrity which directly affects component's quality and performance. Examination of many serious accidents involving aeroengines, has revealed that failure of the first stage compressor blades impacted by foreign object damage (FOD) was the main reason caused, such as bird strikes. Aerospace material 17-4 PH stainless steel with its high mechanical properties is used for the first stage compressor blades of aeroengine to reduce failure from FOD; however, the effects of burnishing on surface integrity of 17-4 PH steel have not been well documented. In this research, it is demonstrated that improvement is material properties can be achieved by hydrostatic ball burnishing applied to 17-4 PH steel, such as smoother surfaces, enhanced surface hardness and impact strength, and high magnitude of compressive residual stresses with a greater depth of layer. For surface roughness, burnishing pressure, speed and feed are significant factors whereas turned surface roughness is negligible. A second-order empirical model was obtained and validated with experimental data. The pressure is the most important factor for both surface hardness and impact strength, as well as for residual stresses at the surface and maximum magnitude with its depth. The triaxial residual stress profiles were obtained while the hook-shaped residual stress profiles were observed under low pressure. The full width at half maximum (FWHM) values show the near-surface work hardening state as one evidence assisted with the analysis of surface hardness and impact strength. The results indicated the potential benefits of the ball burnishing application for the aerospace blade material.
Ioan Marinescu (Committee Chair)
Abdollah Afjeh (Committee Member)
Hongyan Zhang (Committee Member)
84 p.

Recommended Citations

Citations

  • Zhang, T. (2013). The Effects of Ball Burnishing for Aerospace Blade Material 17-4 PH Steel [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1384971374

    APA Style (7th edition)

  • Zhang, Tao. The Effects of Ball Burnishing for Aerospace Blade Material 17-4 PH Steel. 2013. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1384971374.

    MLA Style (8th edition)

  • Zhang, Tao. "The Effects of Ball Burnishing for Aerospace Blade Material 17-4 PH Steel." Master's thesis, University of Toledo, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1384971374

    Chicago Manual of Style (17th edition)