EFFECT OF HEAT TREATMENT ON MICROSTRUCTURE AND PROPERTIES OF Ti-22Al-25Nb ALLOY FABRICATED BY SELECTIVE LASER MELTING

被引：0

作者：

Polozov, Igor ^{[1
]}

Sufiiarov, Vadim ^{[1
]}

Kantyukov, Artem ^{[1
]}

Popovich, Anatoliy ^{[1
]}

机构：

[1] Peter Great St Petersburg Polytech Univ, St Petersburg, Russia

来源：

28TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2019) | 2019年

基金：

俄罗斯科学基金会;

关键词：

Additive manufacturing; Ti-22Al-25Nb; heat treatment; microstructure; intermetallic; MECHANICAL-PROPERTIES; ELEMENTAL POWDERS; BEHAVIOR;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ti-22Al-25Nb orthorhombic alloy is considered to be an advanced intermetallic alloy for high-temperature applications. In this paper, the effects of Hot Isostatic Pressure (HIP), homogenizing annealing and aging in different phase regions on microstructure and microhardness of the Ti-22Al-25Nb alloy obtained from elemental powders by Selective Laser Melting (SLM) were studied. HIP allowed to reduce the residual porosity in the samples, however high-temperature annealing was needed to dissolve Nb particles and obtain a homogeneous microstructure. Differential Scanning Calorimetry was used to determine phase transition temperatures in the fabricated alloy and allowed to choose appropriate aging temperatures. Aging of the alloy resulted in the formation of intermetallic Ti2AlNb and Ti3Al phase depending on the temperature.

引用

页码：1511 / 1516

页数：6

共 7 条

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