Remarkable increase in heat resistance of precipitation structure in 2219 alloy via preferable segregation of alloying elements at semicoherent θ′/(Al) interface

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-04-15 DOI:10.1016/j.matlet.2025.138584

T.K. Akopyan , A.A. Lukyanchuk , N.V. Letyagin , F.O. Milovich , I.S. Solovev

引用次数: 0

Abstract

Heat treatment route of the wrought sheet 2219 alloy including aging at 250 °C and stabilizing annealing at 300 °C/100 h delivered a hardness of 93–95 HV. Analysis of the precipitation structure revealed the formation of faceted θ′ phase crystals with a length of 0.5–1.0 µm, a thickness of 10–25 nm and a width of up to 300 nm for individual crystals. Quantitative analysis using atomic probe tomography revealed a particularly high tendency for segregation of Mn, Zr and Si atoms at the semicoherent θ′/(Al) interface, the maximum concentration of some of those elements being three to ten times that in the core of θ′.

查看原文本刊更多论文

通过合金元素在半相干θ′/（Al）界面的优先偏析，显著提高 2219 合金沉淀结构的耐热性能

采用250℃时效和300℃/100 h稳定退火的变形2219合金板材热处理工艺，硬度为93 ~ 95 HV。对沉淀结构的分析表明，形成了长0.5 ~ 1.0µm、厚10 ~ 25 nm、宽达300 nm的多面θ′相晶体。原子探针层析成像定量分析表明，在半相干θ′/(Al)界面处，Mn、Zr和Si原子的偏析倾向特别高，其中一些元素的最大浓度是θ′核心的3到10倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive