Research on Life Extension Method for Aero-engine Recuperator Based on Brazing Material Adaptability

doi:10.3901/JME.2025.06.103

Abstract

Abstract: Brazed structures are widely used in petrochemical, nuclear power, aerospace and other process equipment fields. However, under the harsh environment such as high temperature and high pressure, the difference in mechanical properties between brazing filler metal and base material can easily lead to cracks in the joints, which can cause structural damage. In order to find a high-temperature life extension method for aero-engine recuperator, a finite element method based on continuous damage mechanics was used to systematically analyze the effects of uniaxial and multiaxial creep properties of BNi-2 fillers containing various copper content on the creep life of brazed joints. The results show that the uniaxial creep life of copper-containing nickel-based fillers is well predicted based on the modified Liu-Murakami intrinsic model. The ductility decreases slightly with the addition of 3% Cu elements, and the creep life of filler metals with more than 6% Cu elements decreases, but the creep fracture strain increases. Under the same load level, when the minimum creep rate mismatch between filler metals and base material is reduced by 5% and 10% respectively, the creep fracture time of the recuperator will be increased by 3.2 times and 11.8 times respectively. Based on the filler metal’s modification design with multi-axial creep performance, the joint creep life increases with the decrease of filler metal’s multi-axial creep performance parameter α. When considering the minimum creep rate and the multi-axial creep performance parameter α, the brazing material change should be devised with the purpose of lowering both. The proposed method of significantly extending the service life of aircraft engine regenerators by adjusting the creep mismatch between the braze filler metal and the base metal may provide an innovative scheme for the service life design of high temperature brazed structures.

Key words: creep, filler metal modification, life extension, brazed joints, recuperator, finite element analysis

CLC Number:

TG114

LIAO Pengpeng, ZHOU Guoyan, ZHANG Yucai, ZHANG Xiancheng, JIANG Wenchun, TU Shantung. Research on Life Extension Method for Aero-engine Recuperator Based on Brazing Material Adaptability[J]. Journal of Mechanical Engineering, 2025, 61(6): 103-111.

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References

[1] 赵璧，宣益民. 航空发动机间冷器及回热器发展研究综述[J]. 航空学报，2017，38(9)：6-26. ZHAO Bi，XUAN Yimin. A review of research on intercoolers and recuperators in aero-engines[J]. Acta Aeronautica et Astronautica Sinica，2017，38(9)：6-26.
[2] 秦海勤，张耀涛，徐可君. 双转子-支承-机匣耦合系统碰摩振动响应分析及试验验证[J]. 机械工程学报，2019，55(19)：75-83. QIN Haiqin，ZHANG Yaotao，XU Kejun. Rubbing vibration response theoretical analysis and experimental verification for a double rotor support casing system[J]. Journal of Mechanical Engineering，2019，55(19)：75-83.
[3] 于女，崔宇，曾若鸣，等. 航空污染的产生和控制机制研究综述[J]. 科学技术与工程，2022，22(32)：14090- 14099. YU Nü，CUI Yu，ZENG Ruoming，et al. Review on generation and control mechanism of aviation pollution[J]. Science Technology and Engineering，2022，22(32)：14090-14099.
[4] 陈城. 航空发动机回热器结构优化及其蠕变性能研究[D]. 青岛：中国石油大学(华东)，2019. CHEN Cheng. Investigation on structure optimization and creep performance of aeroengine recuperator[D]. Qingdao：China University of Petroleum (East China)，2019.
[5] BOGGIA S，RUD K. Intercooled recuperated gas turbine engine concept[C]// Proceedings of 41st AIAA/ASME/ SAE/ASEE Joint Propulsion Conference & Exhibit. Tucson：AIAA，2005，4192.
[6] ROLT A，BAKER N. Intercooled turbofan engine design and technology research in the EU framework 6 NEWAC programme[C]//Proceedings of ISABE 2009 Proceedings. Montreal：ISABE，2009，1278.
[7] ZHANG Y C，JIANG W C，TU S T，et al. Analysis of creep crack growth behavior of the brazed joint using continuum damage mechanics approach[C]// Proceedings of Pressure Vessels and Piping Conference. Prague：ASME，2018，V06AT06A062.
[8] LUO Y，JIANG W C，ZHANG Y C，et al. A new damage evolution model to estimate the creep fracture behavior of brazed joint under multiaxial stress[J]. International Journal of Mechanical Sciences，2018，149：178-189.
[9] TU S T. Emerging challenges to structural integrity technology for high-temperature applications[J]. Frontiers of Mechanical Engineering in China，2007，2(4)：375-387.
[10] MA T，CHEN Y T，ZENG M，et al. Stress analysis of internally finned bayonet tube in a high temperature heat exchanger[J]. Applied Thermal Engineering，2012，43：101-108.
[11] 史进，涂善东，巩建鸣，等. 铸态镍基钎料高温蠕变特性的试验研究[J]. 机械工程材料，2005，29(7)：20-24. SHI Jin，TU Shantung，GONG Jianming，et al. High temperature creep strength of as-cast Ni-based brazing filler[J]. Material for Mechanical Engineering，2005，29(7)：20-24.
[12] 张玉财. 多轴应力状态下钎焊接头蠕变损伤与裂纹扩展研究[D]. 上海：华东理工大学，2016. ZHANG Yucai. Creep damage and crack growth analysis of the brazed joint under multi-axial stress state[D]. Shanghai：East China University of Science and Technology，2016.
[13] CHEN G，WANG G Z，XUAN F Z，et al. Mismatch effect in creep properties on creep crack growth behavior in welded joints[J]. Materials & Design，2014，63：600-608.
[14] KACHANOV L M. On the time to failure under creep conditions[J]. Izvestia Academii Nauk Sssr Otdelenie Tekhnicheskich Nauk，1958，8：26-31.
[15] MURAKAMI S，LIU Y. Mesh-dependence in local approach to creep fracture[J]. International Journal of Damage Mechanics，1995，4(3)：230-250.
[16] NORTON F H. The creep of steel at high temperatures[M]. New York：McGraw-Hill，1929.
[17] 王磊，谈建平，于新海，等. 热力耦合作用下阀门高温结构蠕变疲劳损伤研究[J]. 机电工程，2023，40(5)：633-643. WANG Lei，TAN Jianping，YU Xinhai，et al. Creep fatigue damage of high-temperature structure of valve under thermal-mechanical interaction[J]. Journal of Mechanical & Electrical Engineering，2023，40(5)：633-643.
[18] 张玉财，涂善东，罗云，等. 钎焊接头的蠕变损伤与寿命预测[J]. 机械工程学报，2021，57(16)：218-234，247. ZHANG Yucai，TU Shantung，LUO Yun，et al. Investigation the creep damage and life prediction of the brazed joint[J]. Journal of Mechanical Engineering，2021，57(16)：218-234，247.
[19] 戎万，操齐高，郑晶，等. 高温钎料焊膏研究进展[J]. 贵金属，2020，41(S1)：43-47. RONG Wan，CAO Qigao，ZHENG Jing，et al. Research progress on high temperature solder paste[J]. Precious Metals，2020，41(S1)：43-47.
[20] 梁海，侯万良. 含铝、钛元素的镍基高温钎料的表面反应[J]. 焊接，2015，507(9)：59-61. LIANG Hai，HOU Wanliang. Surface reaction of nickel- based high-temperature brazing materials containing aluminum and titanium elements[J]. Welding & Joining，2015，507(9)：59-61.
[21] 耿育科，罗卫东，郑炜，等. 富铈合金改性镍基钎料钎焊金刚石钻头的性能研究[J]. 机械科学与技术，2022，41(10)：1585-1589. GENG Yuke，LUO Weidong，ZHENG Wei，et al. Study on performance of brazed diamond drill bits with Ce-rich modified Ni-Cr brazing alloy[J]. Mechanical Science and Technology for Aerospace Engineering，2022，41(10)：1585-1589.
[22] 杨佳，张勋业，马广璐，等. SiC_f/SiC复合材料与镍基高温合金钎焊接头的组织及性能[J]. 机械工程学报，2021，57(12)：161-168. YANG Jia，ZHANG Xunye，MA Guanglu，et al. Microstructure and properties of brazed joint between SiC_f/SiC composite and Ni-based superalloy[J]. Journal of Mechanical Engineering，2021，57(12)：161-168.
[23] 周帼彦，廖朋朋，段鹏洋，等. 一种含铜镍基钎料及其制备方法：中国，115446496A[P]. 2022-12-09. ZHOU Guoyan，LIAO Pengpeng，DUAN Pengyang，et al. A copper-containing nickel-based brazing material and its preparation method：China，115446496A[P]. 2022- 12-09.
[24] SCHOENENBORN H，EBERT E，SIMON B，et al. Thermomechanical design of a heat exchanger for a recuperative aeroengine[J]. ASME Journal of Engineering for Gas Turbines and Power，2006，128(4)：736-744.
[25] GOULAS A，Donnerhack S，Flouros M，et al. Thermodynamics cycle analysis，pressure loss，and heat transfer assessment of a recuperative system for aero- engines[J]. ASME Journal of Engineering for Gas Turbines and Power，2015，137(4)：041205.
[26] Zhang Y C，Jiang W C，Tu S T，et al. Creep crack growth behavior analysis of the 9Cr-1Mo steel by a modified creep-damage model[J]. Materials Science & Engineering A，2017，708：68-76.
[27] Lai H S. Estimation of Ct of functionally graded materials under small scale creep stage[J]. Composite Structures，2016，138：352-360.
[28] LEE K H. Analysis of a propagating crack tip in orthotropic functionally graded materials[J]. Composites Part B：Engineering，2016，84：83-97.
[29] Liao P P，Zhang Y C，Zhou G Y，et al. Creep life assessment of aero-engine recuperator based on continuum damage mechanics approach[J]. Frontiers of Mechanical Engineering，2022，17(4)：46.
[30] Yu J，Sun X，Jin T，et al. High temperature creep and low cycle fatigue of a nickel-base superalloy[J]. Materials Science & Engineering A，2010，527(9)：2379-2389.