On the influence of gamma prime upon machining of advanced nickel based superalloy

作者：Liao Zhirong; Axinte Dragos^*; Mieszala Maxime; M'Saoubi Rachid; Michler Johann; Hardy Mark

来源：CIRP Annals, 2018, 67(1): 109-112.

DOI：10.1016/j.cirp.2018.03.021

• Nickel Alloy
• Machining
• Gamma prime phase

Whilst gamma prime (gamma') phase is the strengthening phase in Ni-based superalloys its influence on machining has been seldom investigated. This paper reports for the first time on the effect of gamma' upon machining of Ni-based superalloys when cutting with parameters yielding different cutting temperature intervals which lead to strengthening/softening effects on the workpiece (sub)surface. In-depth XRD, SEM/FIB, EBSD analysis and unique micro-pillar testing in the workpiece superficial layers indicated that with the increase of gamma' fraction the grain plastic deformation significantly decreased, while specific cutting energy can switch from low to high values influenced by the real cutting temperature.

• 出版日期2018