A comparative investigation on the microstructural features in Ti-6Al-4Me(Cr,Mo) alloys of annealing conditions-猫眼课题宝

Ti-6Al-4Me(Cr,Mo)合金退火条件下显微组织特征的对比研究

DOI：

10.1016/j.jallcom.2017.11.019

发表时间：

2018-02

期刊：

Journal of Alloys and Compounds,

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

Cong Li;Jian Chen;Wei Li;Jianhua Chen

α+β钛合金在许多工业领域有着广泛的应用。在实验室规模上制备了两种新型合金Ti-6Al-4 Me（Cr，Mo）。采用β相固溶热处理和高温时效工艺研究了合金的微观组织变化。进行了系统的微观结构研究。结果表明，在β相区浸泡的试样，淬火时形成α′马氏体，而Ti-6Al-4Cr合金的组织较均匀。时效处理后，两种合金均呈现典型的魏氏组织。随着时效温度的升高，Ti-6Al-4Cr合金中的α片晶尺寸比Ti-6Al-4 Mo合金中的明显粗大。在Ti-6Al-4Cr合金中，600 °C时效试样中，沿α/β界面沿着有TiCr 2Laves相，在α相的局部还发现了特殊的Cr固溶带。

α+β titanium alloys have been widely used in many industrial fields. Two novel alloys with the name of Ti-6Al-4Me(Cr, Mo) have been fabricated in laboratory scale. β phase solution heat treatment and high temperature aging were performed to study the microstructure variations. A systematic microstructural investigation has been carried out. The results show that samples soaked in β phase field, α′ martensite were formed during the quenching, but in Ti-6Al-4Cr alloy, the microstructure is more uniform. After aging treatment, both alloys present a typical Widmanstätten microstructure. With the increase of the aging temperature, the size of α platelet in Ti-6Al-4Cr alloy coarse more apparently as compare to the Ti-6Al-4Mo alloy. Furthermore, in Ti-6Al-4Cr alloy, samples with 600 °C aging, TiCr2Laves phase was observed along the α/β interface, and in some part of α phase, special Cr solid solution bands were also found.