Investigations of Discontinuous Precipitation and Effects of Strengthening–Toughening Studies on Ni–Co–Al Alloys

ZHOU Yang; WANG Chentuo; ZHOU Fei; LIANG Jiamiao; WANG Jun

doi:10.16080/j.issn1671-833x.2021.01/02.040

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Investigations of Discontinuous Precipitation and Effects of Strengthening–Toughening Studies on Ni–Co–Al Alloys

更新时间：2025-10-30

- Investigations of Discontinuous Precipitation and Effects of Strengthening–Toughening Studies on Ni–Co–Al Alloys
- Aeronautical Manufacturing Technology Vol. 64, Issue 1/2, (2021)
- 作者机构：
  
  1. 上海交通大学材料科学与工程学院,上海,200240
  2. 上海市先进高温材料及其精密成形重点实验室,上海,200240
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2021.01/02.040
  CLC：
- Published：2021
- 稿件说明：
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周阳,王晨拓,周菲,梁加淼,王俊 . Ni–Co–Al合金非连续沉淀相变及其对合金力学性能的强韧化作用研究[J]. 航空制造技术, 2021, 64(1/2): 40-50/73. ZHOU Yang, WANG Chentuo, ZHOU Fei, LIANG Jiamiao, WANG Jun. Investigations of Discontinuous Precipitation and Effects of Strengthening–Toughening Studies on Ni–Co–Al Alloys. Aeronautical Manufacturing Technology, 2021, 64(1/2): 40-50/73.

ZHOU Yang, WANG Chentuo, ZHOU Fei, et al. Investigations of Discontinuous Precipitation and Effects of Strengthening–Toughening Studies on Ni–Co–Al Alloys[J]. Aeronautical Manufacturing Technology, 2021, 64(1/2).
周阳,王晨拓,周菲,梁加淼,王俊 . Ni–Co–Al合金非连续沉淀相变及其对合金力学性能的强韧化作用研究[J]. 航空制造技术, 2021, 64(1/2): 40-50/73. ZHOU Yang, WANG Chentuo, ZHOU Fei, LIANG Jiamiao, WANG Jun. Investigations of Discontinuous Precipitation and Effects of Strengthening–Toughening Studies on Ni–Co–Al Alloys. Aeronautical Manufacturing Technology, 2021, 64(1/2): 40-50/73. DOI： 10.16080/j.issn1671-833x.2021.01/02.040.

ZHOU Yang, WANG Chentuo, ZHOU Fei, et al. Investigations of Discontinuous Precipitation and Effects of Strengthening–Toughening Studies on Ni–Co–Al Alloys[J]. Aeronautical Manufacturing Technology, 2021, 64(1/2). DOI： 10.16080/j.issn1671-833x.2021.01/02.040.

摘要

多元合金中非连续沉淀（Discontinuous Precipitation

DP）的出现通常被认为对力学性能有害。最近研究表明，Ni–Co–Al 合金通过非连续沉淀析出过程可以形成双相层状纳米结构，实现“类珠光体型”的强化效果。为了进一步探究非连续沉淀对 Ni–Co–Al 合金力学性能的影响，总结并讨论了在不同合金成分和热处理条件下，Ni–Co– Al 合金的显微组织及力学性能的变化规律。结果表明，Co 元素含量的增加以及时效温度的降低有利于非连续沉淀析出，而且接近完全转变的 DP 组织能有效地提高 Ni–Co–Al 合金的强度和塑性。通过理论模拟、显微结构表征和力学性能分析，讨论了非连续沉淀的析出行为以及该反应对 Ni–Co–Al 合金力学性能的强韧化作用机制，指出该处理方法为镍基高温合金的强韧化研究提供了新的思路。

Abstract

The occurrence of discontinuous precipitation (DP) in multi-component alloys is usually considered to be deleterious to the mechanical properties. However recent studies have shown that lamellar nanostructure can be produced in Ni–Co–Al alloys via DP

which can be used to strengthen alloys similar to pearlites in steel. In order to further investigate the effect of discontinuous precipitation on the mechanical properties of Ni–Co–Al alloy

this article summarizes and discusses the changes in the microstructure and mechanical properties of the alloy under different alloy compositions and heat treatment conditions. The results show that the increase of Co content and lower aging temperature are favorable for the occurrence of discontinuous precipitation

and near-complete DP structure can effectively improve the strength and plasticity of Ni–Co–Al alloys. Through theoretical modeling

microstructure characterization and mechanical property analysis

the precipitation behavior of discontinuous precipitation and the mechanism of the reaction to strengthen and toughen Ni–Co–Al alloy are also discussed. This treatment method provides new ideas for researches on the strengthening and toughening of Ni–based superalloys.

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