An investigation of resolved shear stress on activation of slip systems during ultraprecision rotary cutting of local anisotropic Ti-6Al-4V alloy: Models and experiments

被引：18

作者：

Zhao, Zejia ^{[1
]}

To, Suet ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Dept Ind & Syst Engn, State Key Lab Ultraprecis Machining Technol, Kowloon, Hong Kong, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE | 2018年 / 134卷

关键词：

Ti-6Al-4V alloy; Lamellar martensite; Anisotropic behaviour; CRSS; Ultraprecision rotary diamond cutting; COMMERCIALLY PURE TITANIUM; CHIP FORMATION; MECHANICAL-PROPERTIES; CRYSTAL ORIENTATION; MICROSTRUCTURE; EVOLUTION; TI6AL4V; PHASE; MACHINABILITY; DEFORMATION;

D O I：

10.1016/j.ijmachtools.2018.07.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ti-6Al-4V alloy with local anisotropic characteristics is produced by electropulsing treatment (EPT) and used in ultraprecision rotary diamond cutting to explore the deformation mechanism of the alloy. Two different orientations of lamellar martensite alpha give rise to the local anisotropic behaviour. Critical resolved shear stress (CRSS) is introduced in this paper to investigate the slip modes of the hexagonal closest packing martensite. A geometrical and physical model is also proposed for calculation of resolved shear stresses on various slipping systems. The results show that glide occurs in some certain directions on the condition that resolved shear stress equals or exceeds the CRSS. The cutting force varies with martensitic orientations, which is supposedly due to the combined effects of lamellar alpha phase sizes and the coordination or competition of diverse slipping directions.

引用

页码：69 / 78

页数：10

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