In-situ measurement of continuous cooling β→α transformation behavior of CP-Ti

被引：48

作者：

Kim, SK ^{[1
]}

Park, JK ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2002年 / 33卷 / 04期

关键词：

D O I：

10.1007/s11661-002-0206-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The beta --> alpha transformation kinetics of CP-Ti during continuous cooling was measured using a fully computer-controlled resistivity-temperature real-time measurement apparatus. Unlike the pure Ti case, the massive transformation occurs at medium cooling rates, about 90 degreesC/s to 600 degreesC/s. Its start temperature is estimated to be about 890 degreesC, which is close to the To temperature. The reason for the appearance of massive transformation in CP-Ti is because CP-Ti contains a significant amount of Fe as an impurity, which leads to the T-0(beta --> alpha) vs composition curve being parallel to the composition axis due to its retrograde solubility. The martensitic transformation starts to occur at a cooling rate of about 500 degreesC/s, which is much slower than that (about 3000 degreesC/s) reported in a pure Ti case. This retardation effect of martensitic transformation is also believed to arise from the presence of Fe in CP-Ti, which is a strong beta stabilizer.

引用

页码：1051 / 1056

页数：6

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