Evaluation of Ti Aluminide Intermetallics Processed Through Reaction Synthesis

被引：6

作者：

Gupta, R. K. ^{[1
]}

Pant, Bhanu ^{[1
]}

Agarwala, Vijaya ^{[2
]}

Agarwala, R. C. ^{[2
]}

Sinha, P. P. ^{[1
]}

机构：

[1] Vikram Sarabhai Space Ctr, ISRO, Trivandrum 695022, Kerala, India

[2] Indian Inst Technol, Roorkee 247667, Uttar Pradesh, India

来源：

HIGH TEMPERATURE MATERIALS AND PROCESSES | 2009年 / 28卷 / 03期

关键词：

MECHANICAL-PROPERTIES; TITANIUM ALUMINIDES; IRON ALUMINIDES; YIELD STRENGTH; GRAIN-SIZE; AL; MICROSTRUCTURE; MICROCRYSTALLINE; NIOBIUM;

D O I：

10.1515/HTMP.2009.28.3.121

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Titanium aluminides based on Ti48Al with Cr and Nb additions has been made through reaction synthesis (RS) process. Development of various phases in RS and after homogenization has been studied through X-ray diffraction (XRD), optical microscopy (OM) and Transmission Electron Microscopy (TEM). Uniform distribution of elements was confirmed through elemental mapping, EDAX and hardness measurements. It is observed that, mainly Al3Ti phase forms during reaction synthesis and TiAl (gamma) and Ti3Al (alpha(2)) phases form after homogenization. Density of the product was measured and found to be nearly equal to theoretical density of the alloy. Improvement in hardness is observed after homogenization, which is found to be due to formation of gamma. phases. A high temperature oxidation study of the ternary and quaternary alloy was carried out and it was noted that oxidation resistance of quaternary alloy is better than ternary alloy (with Cr). Processing aspects and properties of present alloys is compared with RS processed binary Ti alumnide.

引用

页码：121 / 132

页数：12

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