Enhanced tensile creep property at 700 °C and microstructure evolution of Ti60 alloy rolled sheet induced by solution-aging treatment

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2025-04-01 DOI:10.1007/s10853-025-10767-z

Zhen Gong, Shulin Dong, Zhiyong Chen, Yingdong Qu, Ruirun Chen, Guanglong Li, Wei Zhang

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Abstract

Creep failure is an important failure mode of Ti alloys serving in the aviation field. Therefore, in order to improve the high temperature creep property of Ti alloys. The high temperature tensile creep tests of Ti60 alloy rolled sheet before and after solution-aging treatment were carried out at 700 °C and different stress conditions. The creep stress exponent was obtained, the microstructure was observed, and the evolution behavior of the texture was analyzed. The results show that the creep life of the sample after solution-aging treatment was significantly improved. Taking 700 °C–150 MPa as an example, the creep life was increased from 200 to 8918 min. The creep stress exponent of the sample after solution-aging treatment is 6.74. This shows that at 700 °C, the mechanism of dislocation climbing is dominant, and dislocation slip is secondary. It has a strong {10-12}<10-11> texture after solution-aging treatment. The {10-12}<10-11> texture belongs to twin texture. There are a large number of ∑33c twin boundary in the samples after high temperature solution-aging treatment. The existence of ∑33c twin boundary is helpful to improve the high temperature creep property.

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固溶时效对Ti60合金轧制薄板700℃拉伸蠕变性能的影响及组织演变

蠕变破坏是服役于航空领域的钛合金的一种重要破坏形式。因此，为了提高钛合金的高温蠕变性能。在700℃和不同应力条件下，对固溶时效处理前后的Ti60合金轧制薄板进行了高温拉伸蠕变试验。获得了蠕变应力指数，观察了显微组织，分析了织构的演化行为。结果表明，固溶时效处理后试样的蠕变寿命明显提高。以700℃~ 150 MPa为例，蠕变寿命由200 min提高到8918 min，固溶时效处理后试样的蠕变应力指数为6.74。这表明，在700℃时，位错爬升机制占主导地位，位错滑移为辅。它具有很强的{10-12}<；10-11>；固溶时效处理后的织构。{10 - 12} & lt; 10-11>纹理属于双纹理。高温固溶时效处理后的试样中存在大量的∑33c孪晶界。∑33c孪晶界的存在有利于提高合金的高温蠕变性能。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.