增材制造高温合金在不同温度下的拉伸性能与变形机制

doi:10.11901/1005.3093.2024.106

材料研究学报

2025, Vol. 39

Issue (1): 1-10 DOI: 10.11901/1005.3093.2024.106

研究论文

本期目录 | 过刊浏览

增材制造高温合金在不同温度下的拉伸性能与变形机制

王娜¹^,², 李文彬²^,³, 庞建超²(

), 陈立佳¹(

), 高崇², 邹成路², 张辉³, 李守新², 张哲峰²

1 沈阳工业大学材料科学与工程学院沈阳 110870
2 中国科学院金属研究所沈阳材料科学国家研究中心沈阳 110016
3 东北大学材料电磁过程研究教育部重点实验室沈阳 110819

Tensile Properties and Deformation Mechanism of Additive Manufacturing Superalloy at Different Temperatures

WANG Na¹^,², LI Wenbin²^,³, PANG Jianchao²(

), CHEN Lijia¹(

), GAO Chong², ZOU Chenglu², ZHANG Hui³, LI Shouxin², ZHANG Zhefeng²

1 School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
2 Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China
3 Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China

引用本文:

王娜, 李文彬, 庞建超, 陈立佳, 高崇, 邹成路, 张辉, 李守新, 张哲峰. 增材制造高温合金在不同温度下的拉伸性能与变形机制[J]. 材料研究学报, 2025, 39(1): 1-10.
Na WANG, Wenbin LI, Jianchao PANG, Lijia CHEN, Chong GAO, Chenglu ZOU, Hui ZHANG, Shouxin LI, Zhefeng ZHANG. Tensile Properties and Deformation Mechanism of Additive Manufacturing Superalloy at Different Temperatures[J]. Chinese Journal of Materials Research, 2025, 39(1): 1-10.

全文: PDF(26209 KB) HTML

摘要:

用增材制造激光选区熔化工艺制备典型的高温合金GH4169并在25~650 ℃测试其拉伸性能，用扫描电镜和透射电镜等手段表征其微观组织和拉伸变形行为，研究了测试温度对其力学性能的影响和变形机制。结果表明，在25 ℃、600 ℃和650 ℃测试这种合金的拉伸性能，其拉伸曲线较为光滑，在450~550 ℃测试的曲线呈锯齿状。随着测试温度的提高合金的抗拉强度从1458 MPa降低到1228 MPa，屈服强度则从1234 MPa下降到1051 MPa。SLM GH4169合金的拉伸强度与温度之间的关系大致是线性的。在25~450 ℃测试，合金中的强化相阻碍位错运动产生了强化作用；在550~650 ℃滑移为主要变形方式，δ相不利于拉伸性能。

关键词 ：金属材料, GH4169合金, 实验温度, 微观组织, 变形机制

Abstract：

The typical superalloy GH4169 was prepared by selective laser melting (SLM), and then subjected to appropriate post-heat treatments, afterwardsits tensile properties was assessed in temperature range 25~650 ^oC. The microstructure evolution, tensile behavior at different temperatures were examinedby scanning electron microscopy and transmission electron microscopy, and the corresponding deformation mechanism of SLM GH4169 alloy was disscussed. The results show that the tensile curves of the of SLM GH4169 alloy are monotonic and smooth at 25 ^oC, 600 ^oC and 650 ^oC, but those at 450~550 ^oC are sawtooth-like. With the increasing test temperature, the tensile strength and yield strength of the SLM GH4169 alloy decreases from 1458 MPa to 1228 MPa and 1234 MPa to 1051 MPa respectively. The relationship between tensile strength and temperature of the SLM GH4169 is roughly linear with an error is less than 2%.The strengthening phases may obstruct the dislocation movement and plays a certain strengthening role in the temperature range 25~450 ^oC. While in the range 550~650 ^oC, slip bands may be the main deformation mode, and δ phases also has an adverse effect on tensile properties.

Key words： metallic materials GH4169 superalloy experimental temperature microstructure deformation mechanism

收稿日期: 2024-03-06

ZTFLH:

TG132.3+2

基金资助:国家自然科学基金(51871224);国家自然科学基金(52130002);国家自然科学基金(52321001);航空发动机及燃气轮机基础科学中心项目(P2022-C-IV-001-001)

通讯作者: 庞建超，副研究员，jcpang@imr.ac.cn，研究方向为材料疲劳与断裂；
陈立佳，教授，chenlijia@sut.edu.cn，研究方向为轻金属的疲劳行为及失效机理

Corresponding author: PANG Jianchao, Tel: (024)83978779, E-mail: jcpang@imr.ac.cn;
CHEN Lijia, Tel: (024)25496301, E-mail: chenlijia@sut.edu.cn

作者简介: 王娜，女，1999年生，硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2024.106 或 https://www.cjmr.org/CN/Y2025/V39/I1/1

表1 SLM GH4169粉末的化学成分

表2 激光选区熔化工艺参数[22]

图1 拉伸试样的几何尺寸

图2 热处理态SLM GH4169合金在不同构建方向的SEM图片和晶界处的短棒状δ相、晶内针状δ相、γ″、γ′相的形貌

图3 SLM GH4169合金在不同温度下的拉伸性能

图4 SLM GH4169合金不同温度下的拉伸断口形貌

图5 SLM GH4169合金在不同温度的工程应力-应变曲线

图6 SLM GH4169合金在450 ℃和550 ℃拉伸曲线上的锯齿流变

图7 SLM GH4169强度与温度的关系

图8 SLM GH4169合金原始态组织图和在不同温度拉伸变形后的组织的EBSD分析

表3 在不同温度拉伸实验后晶界的统计

图9 SLM GH4169合金原始态和在不同温度拉伸变形后的KAM图

图10 SLM GH4169合金在不同温度下拉伸实验后变形组织TEM的照片

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