Effect of solution and aging on the texture evolution of an extruded metastable β titanium alloy Ti-4Al-6V-5Mo-3Cr-1Zr

IF 3.5 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Chenying Xi, Lin Song, Yunxi Liu, Daria Lazurenko, Tiebang Zhang
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引用次数: 0

Abstract

Compared to α + β titanium alloys, β titanium alloys exhibit superior heat treatment strengthening effects. Specifically, after solid solution treatment followed by two-stage aging, the alloy features finer secondary α (αs) phases compared to primary α (αp) phases, resulting in enhanced second phase strengthening effects. This study focuses on the effects of various aging parameters on the texture evolution of an as extruded high strength metastable β titanium alloy Ti-4Al-6V-5Mo-3Cr-1Zr using synchrotron high-energy X-ray diffraction and electron microscopy. After extrusion, two primary fiber textures are formed within the β phase: < 200 > and < 110 > fiber texture. The intensity of β phase texture fluctuates during aging primarily attributed to phase transformations altering the volume fractions of the two phases. The α phase predominantly exhibited the conventional < 0002 > fiber texture, along with an unconventional < 10 \(\overline{1 }\) 1 > component rarely reported in prior studies of metastable β titanium alloys, with their orientations rotating during high-temperature aging. This rotation originates from variant selection during the precipitation of αs phase from the β matrix, leading to crystallographic orientations distinct from the preferred orientation of αp phase formed during extrusion.

固溶和时效对挤压亚稳β钛合金Ti-4Al-6V-5Mo-3Cr-1Zr织构演变的影响
与α + β钛合金相比,β钛合金具有更好的热处理强化效果。具体而言,经过固溶再两段时效处理后,合金的次生α (αs)相较初生α (αp)相细,第二相强化效果增强。采用同步高能x射线衍射和电子显微镜研究了不同时效参数对挤压高强度亚稳β钛合金Ti-4Al-6V-5Mo-3Cr-1Zr织构演变的影响。挤压后,β相内形成两种主要纤维织构:&lt; 200 &gt;和&lt; 110 &gt;纤维织构。时效过程中β相织构强度的波动主要是由于相变改变了两相的体积分数。α相主要表现为传统的&lt; 0002 &gt;纤维织构,同时存在一种非常规的&lt; 10 \(\overline{1 }\) &gt;组分,在高温时效过程中取向旋转,这在以前的亚稳β钛合金研究中很少报道。这种旋转源于αs相从β基体中析出时的变异选择,导致αp相在挤压过程中形成的取向不同。
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来源期刊
Journal of Materials Science
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.
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