热等静压对第三代单晶高温合金<strong>DD33</strong>显微组织和持久性能的影响

doi:10.11901/1005.3093.2021.490

材料研究学报

2022, Vol. 36

Issue (9): 649-659 DOI: 10.11901/1005.3093.2021.490

研究论文

本期目录 | 过刊浏览

热等静压对第三代单晶高温合金DD33显微组织和持久性能的影响

何禹锋¹^,², 王莉¹, 王栋¹, 王绍钢³, 卢玉章¹, 谷阿山⁴, 申健¹(

), 张健¹

^1.中国科学院金属研究所沈阳 110016
^2.中国科学技术大学材料科学与工程学院沈阳 110016
^3.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
^4.中国航发贵州黎阳航空动力有限公司贵阳 550014

Effect of Hot Isostatic Pressing on Microstructure of a Third-Generation Single Crystal Superalloy DD33

HE Yufeng¹^,², WANG Li¹, WANG Dong¹, WANG Shaogang³, LU Yuzhang¹, GU Ashan⁴, SHEN Jian¹(

), ZHANG Jian¹

^1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^2.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China
^3.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
^4.AECC Guizhou Liyang Aviation Power Company Limited, Guiyang 550014, China

引用本文:

何禹锋, 王莉, 王栋, 王绍钢, 卢玉章, 谷阿山, 申健, 张健. 热等静压对第三代单晶高温合金DD33显微组织和持久性能的影响[J]. 材料研究学报, 2022, 36(9): 649-659.
Yufeng HE, Li WANG, Dong WANG, Shaogang WANG, Yuzhang LU, Ashan GU, Jian SHEN, Jian ZHANG. Effect of Hot Isostatic Pressing on Microstructure of a Third-Generation Single Crystal Superalloy DD33[J]. Chinese Journal of Materials Research, 2022, 36(9): 649-659.

全文: PDF(3910 KB) HTML

摘要:

对第三代DD33单晶高温合金进行标准热处理、热等静压以及不同制度的后续固溶和时效处理,并在850℃/650 MPa和1100℃/170 MPa条件下进行高温持久性能实验,使用金相显微镜(OM)、扫描电子显微镜(SEM)和X射线三维成像技术(XCT)等手段观察和表征不同状态的样品,研究了热等静压和热处理对这种合金显微组织和持久性能的影响。结果表明：铸态DD33单晶高温合金经过适当的热等静压和后续热处理工艺后,样品的组织形貌(γ′相尺寸、体积分数与立方化程度)与标准热处理态基本相同。与标准热处理态合金相比,热等静压处理后合金显微孔洞的体积分数和尺寸均显著降低,其体积分数从0.0190%降低到0.0005%,最大孔等效直径从36.9 μm减小到14.2 μm。在850℃/650 MPa和1100℃/170 MPa条件下热等静压后的样品持久寿命均显著延长。这表明,适当的热等静压和热处理能消除合金内部的显微孔洞缺陷,使其持久性能显著提高。

关键词 ：金属材料, 热等静压, 单晶高温合金, 显微孔洞, 持久性能, X射线成像

Abstract：

The third generation DD33 single crystal superalloy was subjected to standard heat treatment and hot isostatic pressing respectively, and then to different post-solution and -aging treatments. Hereafter, the effect of hot isostatic pressing and heat treatment on the microstructure and durability of the alloy were investigated by means of high-temperature endurance tests at 850℃/650 MPa and 1100℃/170 MPa, as well as metallographic microscope (OM), scanning electron microscope (SEM) and X-ray three-dimensional imaging (XCT). The results show that after proper hot isostatic pressing and subsequent heat treatment, the as-cast DD33 single crystal superalloys present more or less the same microstructure of (γ' phase size, volume fraction and cubic degree) as those subjected to standard heat treatment. Compared with the standard heat treated alloy, the volume fraction and size of the micropores of the alloy decreased significantly after hot isostatic pressing, from 0.0190% to 0.0005%, and the maximum equivalent diameter of the micropores decreased from 36.9 μm to 14.2 μm. The durable life of the alloy subjected to hot isostatic pressing was significantly prolonged when testing by 850℃/650 MPa and 1100℃/170 MPa. These results show that proper hot isostatic pressing and heat treatment can eliminate the micro voids, therewith, improve the durability of the alloy.

Key words： metal materials hot isostatic pressing single crystal superalloy micro-pore stress rupture properties X-ray tomography

收稿日期: 2021-08-24

ZTFLH:

TG132.32

基金资助:国家自然科学基金(51631008);国家自然科学基金(91860201);国家自然科学基金(51771204);国家自然科学基金(51911530154);国家自然科学基金(U1732131);国家重大科技专项(2017-VII-0008-0101);国家重大科技专项(2017-VI-0003-0073);国家重大科技专项(J2019-Ⅵ-0010);中国科学院重点部署项目(ZDRWCN-2019-01)

作者简介: 何禹锋,男,1993年生,博士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.490 或 https://www.cjmr.org/CN/Y2022/V36/I9/649

表1 实验用高温合金的名义成分

表2 实验所涉及热等静压参数及热处理制度

表3 XCT设备所采用的工作参数

图1 HRS铸态DD33合金的组织形貌

图2 HRS标准热处理态DD33合金的组织形貌

图3 HRS铸态和热等静压态DD33合金的组织形貌

图4 不同热等静压后续固溶处理态DD33合金的组织形貌

图5 不同热等静压后续完整热处理态DD33合金γʹ 的组织形貌

图6 热等静压态和热等静压后续完整热处理态DD33合金中碳化物附近的EBSD结果

图7 准原位观察DD33铸态样品热等静压前后微孔的演化

图8 HRS标准热处理态和热等静压后完整热处理态DD33合金内部微孔的三维特征

表4 热等静压对DD33合金不同条件下持久性能的影响

图9 DD33合金HRS和HIP样品在1100℃/170 MPa下持久断口的组织形貌

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