高温钛合金的塑性滑移机制：硅化物和 Ti3Al 沉淀对延展性的影响

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2024-10-21 DOI:10.1016/j.scriptamat.2024.116412

Heqing Zhang , Changjiang Zhang , Xiaojian Liang , Ruipeng Guo , Hong Feng , Zhaoping Hou , Jianchao Han , Min Cheng , Shuzhi Zhang , Tao Wang , Peng Cao

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引用次数: 0

摘要

由于硅化物和 α2 (Ti3Al) 沉淀，近 α 高温钛合金的延展性较低。本研究探讨了调整 Al/Zr 比率如何影响这些沉淀物及其对延展性的影响。分散的硅化物析出物激活了金字塔形〈c + a〉滑移系统，通过限制基底〈a〉滑移提高了延展性。相反，α2 纳米粒子会促进基底〈a〉滑移，导致平面位错和延展性降低。这些发现为通过控制沉淀平衡近α高温钛合金的强度和延展性提供了一种新策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Plastic slip mechanisms in high-temperature titanium alloys: Insights into silicide and Ti3Al precipitates on ductility

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Plastic slip mechanisms in high-temperature titanium alloys: Insights into silicide and Ti3Al precipitates on ductility

Near-α high-temperature titanium alloys suffer from low ductility due to silicide and α₂ (Ti₃Al) precipitates. This study explores how adjusting the Al/Zr ratio affects these precipitates and their impact on ductility. Dispersed silicide precipitates activate the pyramidal 〈c + a〉 slip systems, enhancing ductility by limiting basal 〈a〉 slip. Conversely, α₂ nanoparticles promote basal 〈a〉 slip, resulting in planar dislocations and reduced ductility. These findings offer a new strategy for balancing strength and ductility in near-α high-temperature titanium alloys through controlled precipitation.

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.