镍基单晶高温合金冷热循环过程中圆孔周围裂纹萌生与扩展行为
网络出版日期: 2015-10-30
基金资助
*国家自然科学基金项目51201164, 国家高技术研究发展计划项目2012AA03A511和国家重大科学仪器设备开发专项项目2012YQ22023304资助
CRACK INITIATION AND PROPAGATION AROUND HOLES OF Ni-BASED SINGLE CRYSTAL SUPERALLOY DURING THERMAL FATIGUE CYCLE
Online published: 2015-10-30
Supported by
Supported by National Natural Science Foundation of China (No.51201164), National High Technology Research and Development Program of China (No.2012AA03A511) and National Key Scientific Instrument and Equipment Development Project (No.2012YQ22023304)
选用第二代镍基单晶高温合金, 制备了平行于定向凝固方向且分别沿(100)面和(110)面的2组板式试样, 采用电火花方法在试样中心垂直于板面加工孔径为0.5 mm的圆孔. 采用室温到1100 ℃的冷热疲劳实验, 研究了冷热循环过程中不同晶体学平面的板式试样上圆孔周围裂纹萌生及扩展行为. 结果表明, 位于不同晶体学平面的板式试样中, 电火花方法加工圆孔周围产生了一薄层再铸层, 再铸层最厚处约15 mm. 板式试样所在晶体学平面对圆孔周围裂纹萌生及扩展行为影响显著. 冷热循环80 cyc后, (110)面试样中, 裂纹在与枝晶生长方向垂直的孔边产生, 之后迅速沿与枝晶生长方向呈45°角扩展. 而对于(100)面试样, 即使经过200 cyc冷热循环后孔边也未观察到裂纹, 造成此差异的本质原因是单晶高温合金晶体结构的各向异性导致的热应力差别与微观组织特征共同作用的结果.
王莉,周忠娇,张少华,降向冬,楼琅洪,张健 . 镍基单晶高温合金冷热循环过程中圆孔周围裂纹萌生与扩展行为[J]. 金属学报, 2015 , 51(10) : 1273 -1278 . DOI: 10.11900/0412.1961.2015.00366
Ni-based single crystal (SX) superalloys are widely used for production of blades in gas turbines and aircraft engines for their superior mechanical performance at high temperatures. To obtain high cooling efficiency, most of the SX blades consist of thin wall with cooling holes. However, thermal fatigue cracks are usually observed in blades with this kind of structures. Thus, it must be valuable to investigate the crack initiation and propagation around a hole during thermal fatigue tests in a SX superalloy. In the present work a second generation SX Ni-based superalloy was used. Plate specimens that parallel to directional solidification (DS) direction and along (100) or (110) planes were prepared. A hole with diameter of 0.5 mm was drilled vertical to the surface in the middle of the plate by electro-discharge machining (EDM). Thermal fatigue tests were performed between room temperature and 1100 ℃. Effect of crystal orientation on the crack initiation and propagation was investigated and the reasons were analyzed. It was found that a thin recast layer was produced around holes of EDM drilled. The thickness of the recast layer was 15 mm in the maximum. Crystal orientation has great effect on the crack initiation sites and propagation kinetics. After 80 cyc thermal fatigue tests, in (110) specimens cracks initiated at the edge of the holes that vertical to the DS direction, then grew quickly and propagated along directions about 45° from the DS direction. After 200 cyc tests, cracks developed to more than 2 mm in length. While in (100) specimens no cracks could be observed even after 200 cyc thermal fatigue tests. This difference was mainly due to the combined effects of different thermal stress caused by the anisotropy of single crystals and of the microstructure characteristics.
| [1] | He G, Li J G, Mao X M, Fu H Z. Mater Rev, 1994; (1): 12 (何 国, 李建国, 毛协民, 傅恒志. 材料导报, 1994; (1): 12) |
| [2] | Yue Z F, Yin Z Y, Yang Z G. Aeroengine, 1997; (4): 32 (岳珠峰, 尹泽勇, 杨治国. 航空发动机, 1997; (4): 32) |
| [3] | Ohyszko A, Kubiak K, Sieniawski J. J Achievements Mater Manuf Eng, 2009; 32(1): 66 |
| [4] | Shah D M, Cetel A. In: Pollock T M, Kissinger R D, Bowman R R, Green K A, McLean M, Olson S, Schirra J J eds., Superalloys 2000, Warrendale: TMS, 2000: 295 |
| [5] | Duhl D N, Cetel A D. US Pat, 4719080, 1988 |
| [6] | Harris K, Wahl J B. In: Strang A, Banks W M, Conroy R D, McColvin, Neal J C, Simpson S eds., Proc 5th Int Charles Parsons Turbine Conf, London: Cambridge University, 2000: 832 |
| [7] | Walston W S, O'hara K S, Ross E W, Pollock T M, Murphy W H. In: Kissinger R D, Deye D J, Anton D L, Cetel A D, Nathal M V, Pollock T M, Woodford D A eds., Superalloys 1996, Warrendale: TMS, 1996: 27 |
| [8] | Fuchs G E. J Mater Eng Perform, 2002; 11(1): 19 |
| [9] | Hollwarth B R, Dagan L. ASME J Eng Power, 1980; 102: 994 |
| [10] | McNally C A, Folkes J, Pashby I R. Mater Sci Technol, 2004; 20: 805 |
| [11] | Kim Y J, Kim S M. Int J Heat Mass Transfer, 2004; 47: 245 |
| [12] | Hou N X, Wen Z X, Du Z X, Yue Z F. Theor Appl Fract Mech, 2007; 47: 164 |
| [13] | Das D K, Pollock T M. J Mater Proc Technol, 2009; 209: 5661 |
| [14] | Zhou Z J, Wang L, Wen J L, Lou L H, Zhang J. J Alloys Compd, 2015; 628: 158 |
| [15] | Wang J L, Chen M H, Yang L L, Zhu S L, Wang F H. Corros Sci, 2015; 98: 530 |
| [16] | Alamn M Z, Satyanarayana D V V, Chatterjee D, Sarkar R, Das D K. Mater Sci Eng, 2015; A641: 84 |
| [17] | Wang L, Zhou Z J, Jiang W G, Wang D, Shen J, Lou L H. Chin J Mater Res, 2014; 28: 663 (王 莉, 周忠娇, 姜卫国, 王 迪, 申 健, 楼琅洪. 材料研究学报, 2014; 28: 663) |
| [18] | Sabnis P A, Maziere M, Forest S, Arakere N K, Ebrahimi F. Int J Plast, 2012; 28: 102 |
| [19] | Li Y L, Yuan C, Guo J T. Acta Metall Sin, 2006; 42: 1056 (李友林, 袁 超, 郭建亭. 金属学报, 2006; 42: 1056) |
| [20] | Xia P C, Yu J J, Sun X F, Guan H R, Hu Z Q. Rare Met Mater Eng, 2008; 37: 50 (夏鹏成, 于金江, 孙晓峰, 管恒荣, 胡壮麒. 稀有金属材料与工程, 2008; 37: 50) |
| [21] | Liu Y, Yu J J, Xu Y, Sun X F. Rare Met Mater Eng, 2009; 38: 59 (刘 源, 于金江, 徐 岩, 孙晓峰. 稀有金属材料与工程, 2009; 38: 59) |
| [22] | Xiao X, Xu H, Qin X Z, Guo Y A, Guo J T, Zhou L Z. Acta Metall Sin, 2011; 47: 1129 (肖 旋, 许 辉, 秦学智, 郭永安, 郭建亭, 周兰章. 金属学报, 2011; 47: 1129) |
| [23] | Liu J L, Jin T, Zhang J H, Hu Z Q. Acta Metall Sin, 2001; 37: 1233 (刘金来, 金 涛, 张静华, 胡壮麒. 金属学报, 2001; 37: 1233) |
| [24] | Zhao N R, Wang Z H, Li J G, Jin T, Sun X F, Yang H C, Hu Z Q. J Mater Eng, 2008; (2): 58 (赵乃仁, 王志辉, 李金国, 金 涛, 孙晓峰, 杨洪才, 胡壮麒. 材料工程, 2008; (2): 58) |
| [25] | Li J R, Shi Z X, Yuan H L, Liu S Z, Zhao J Q, Han M, Liu W W. J Mater Eng, 2008; (12): 6 (李嘉荣, 史振学, 袁海龙, 刘世忠, 赵金乾, 韩 梅, 刘维维. 材料工程, 2008; (12): 6) |
| [26] | Jia Y X, Jin T, Liu J L, Sun X F, Hu Z Q. Acta Metall Sin, 2009; 45: 1364 (贾玉贤, 金 涛, 刘金来, 孙晓峰, 胡壮麒. 金属学报, 2009; 45: 1364) |
| [27] | Hu G X,Cai X,Rong Y H. Fundamentals of Materials Science. 3rd Ed., Shanghai: Shanghai Jiaotong University Press, 2010: 431 (胡赓祥,蔡 珣,戎咏华. 材料科学基础 (第三版). 上海: 上海交通大学出版社, 2010: 431) |
| [28] | Jin Z X. Central Iron Steel Res Inst Tech Bull, 1985; 5: 205 (金哲学. 钢铁研究总院学报, 1985; 5: 205) |
| [29] | Academic Committee of the Superalloys,The Chinese Society for Metals. China Superalloys Handbook. Beijing: Standards Press of China, 2012 (中国金属学会高温材料分会编. 中国高温合金手册. 北京: 中国标准出版社, 2012) |
| [30] | Chao J, Gonzalez-Carrasco J L. Mater Sci Eng, 1997; A230: 39 |
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