EFFECT OF ZR, SN AND AL ADDITIONS ON DEFORMATION MODE AND BETA PHASE-STABILITY OF METASTABLE BETA TI ALLOYS

被引：95

作者：

ISHIYAMA, S ^{[1
]}

HANADA, S ^{[1
]}

IZUMI, O ^{[1
]}

机构：

[1] TOHOKU UNIV,INST MAT RES,AOBA KU,SENDAI,MIYAGI 980,JAPAN

来源：

ISIJ INTERNATIONAL | 1991年 / 31卷 / 08期

关键词：

BETA-TITANIUM; (332) TWINNING; DEFORMATION INDUCED MARTENSITE; OMEGA-PHASE; DEFORMATION MODE;

D O I：

10.2355/isijinternational.31.807

中图分类号：

TF [冶金工业];

学科分类号：

0806 [冶金工程];

摘要：

The relation between deformation mode and beta phase stability was investigated using Ti-16V and Ti-7Cr base alloys doped with Sn, Zr and Al as ternary or quaternary additions. Sn and Al additions change the dominant deformation mode from (332) twinning in the binary alloys to deformation induced martensitic transformation, which is related to the suppression of athermal omega phase transformation by the addition of these elements. The deformation induced martensite has orthorhombic structure (alpha") or hexagonal structure (alpha') depending on the alloying element. On the other hand, Zr addition has no significant influence on deformation mode and athermal omega phase transformation, and thus the dominant deformation mode of Zr added alloys is (332) twinning identical to the binary alloys. Discrepancy in deformation mode observed in metastable beta titanium alloys can be explained reasonably by considering the present results on the effect of Sn, Zr and Al on the deformation mode.

引用

页码：807 / 813

页数：7

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