FATIGUE PROPERTY ENHANCEMENT OF ALPHA-BETA TITANIUM-ALLOYS BY BLENDED ELEMENTAL P/M APPROACH

被引：37

作者：

HAGIWARA, M

KAIEDA, Y

KAWABE, Y

MIURA, S

机构：

[1] SHOWA DENKO CO LTD,CHICHIBU RES LAB,CHICHIBU,SAITAMA 36918,JAPAN

[2] NATL RES INST MET,MEGURO KU,TOKYO 153,JAPAN

来源：

ISIJ INTERNATIONAL | 1991年 / 31卷 / 08期

关键词：

ALPHA-BETA TITANIUM ALLOY; POWDER METALLURGY; BLENDED ELEMENTAL METHOD; MICROSTRUCTURE MODIFICATION; PRECISION SECTIONING METHOD; FATIGUE;

D O I：

10.2355/isijinternational.31.922

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Attempts were made to produce fatigue tolerant alpha-beta titanium alloys by the blended elemental (BE) P/M method using extra low chlorine (ELCL) titanium powder. The study was conducted in two stages. In the first stage, the effect of microstructural modification on the high cycle fatigue strength of ELCL BE Ti-6A1-4V was investigated. Several different microstructural conditions were generated through combinations of processing and heat treatment and these were fatigue tested to find out the optimum microstructure. In a later stage, various kinds of ELCL BE alpha-beta titanium alloys were produced by both conventional and microstructure-controllable new BE methods with emphasis on relating composition/processing/micro-structure to fatigue properties. The precision sectioning method which enables the concurrent observation of the initiation facets and the underlying microstructure was utilized to analyze fatigue crack initiation mechanisms.

引用

页码：922 / 930

页数：9

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