Effects of Fine Particle Bombarding on Surface Characteristics and Fatigue Strength of Commercial Pure Titanium

被引：27

作者：

Morita, Tatsuro ^{[1
]}

Nakaguchi, Hidemasa ^{[2
]}

Noda, Syo ^{[3
]}

Kagaya, Chuji ^{[4
]}

机构：

[1] Kyoto Inst Technol, Grad Sch Sci & Technol, Dept Mech & Syst Engn, Kyoto 6068585, Japan

[2] Yamazaki Mazak Minokamo Co, INTE Prod Sect, Minokamo 5050005, Japan

[3] Mitsubishi Elect Bldg Technoserv Co Ltd, Tokyo Off, Tokyo 1160002, Japan

[4] Chubu Univ, Fac Engn, Dept Mech Engn, Kasugai, Aichi 4878501, Japan

来源：

MATERIALS TRANSACTIONS | 2012年 / 53卷 / 11期

关键词：

surface modification; fine particle bombarding; shot peening; commercial pure titanium; microstructure; nano-crystal; surface hardness; hardness distribution; residual stress; mechanical properties; fatigue strength; subsurface crack; PLASTIC-DEFORMATION; NANOCRYSTALLIZATION; STEELS;

D O I：

10.2320/matertrans.M2012226

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study investigated the effects of fine particle bombarding (FPB) on the surface characteristics and fatigue strength of commercial pure titanium. For comparison, conventional shot peening (SP) was also performed. The surface microstructure was nano-crystallized by FPB and SP. The grain size of nano-crystals reduced with decreasing particle diameter or increasing air pressure for accelerating particles. The surface hardness and compressive residual stress markedly increased by FPB. The surface layers were uniformly generated along the surface, and effectively suppressed the initiation of fatigue cracks. As a result, the fatigue strength greatly increased. Since the surface layers acted as a barrier to subsurface cracks, its improvement ratio was closely related to the surface characteristics. [doi:10.2320/matertrans.M2012226]

引用

页码：1938 / 1945

页数：8

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