Acta Metall Sin  1995, Vol. 31 Issue (8): 363-369    DOI:

Current Issue | Archive | Adv Search |

INFLUENCE OF Ce ON GROWTH BEHAVIOUR OF PHYSICALLY-SHORT CRACKS FOR Al-Li ALLOYS

CHEN Zheng;NI Yongfeng;HE Ming(Northwestern Polytechnical University;Xi＇an 710072)(Manuscript received 1994-11-21;in revised form 1995-03-31)

CHEN Zheng;NI Yongfeng;HE Ming(Northwestern Polytechnical University;Xi＇an 710072)(Manuscript received 1994-11-21;in revised form 1995-03-31). INFLUENCE OF Ce ON GROWTH BEHAVIOUR OF PHYSICALLY-SHORT CRACKS FOR Al-Li ALLOYS. Acta Metall Sin, 1995, 31(8): 363-369.

Abstract References Related Articles Recommended Metrics Download:  PDF(570KB)  Export:  BibTeX | EndNote (RIS)       Abstract  The correlations among nominal threshold.intrinsic threshold, crack closure effect and crack wake of alloys 2090 and 8090 were investigated, and compared with that of alloys 7075 and 2024,respectively. Aluminum-lithium alloys possess a excellent threshold of long fatigue cracks and the stronger short crack effect,due to a higher level of crack closure effect and the dependent mentality of closure effect on crack wake.The growth resistance of microcracks of alloy 2090 is inferior to that for alloy 2024,which is attributed to the lower △Ki.△Ki of alloy 8090 is equal to that of alloy 2024, and its growth resistance of short crack is equal or superior to alloy 2024. Furthermore, influence of minor rare earth element Ce on the growth behavior of physically-short cracks for aluminum-lithium alloys 2090 and 8090was studied. A significant improvement in intrinsic threshold and a certain increase in crack closure effect can be achieved by adding Ce into alloy 2090. As result, the notable increase in the growth resistance of long and short fatigue cracks has been obtained. On the contrary,the intrinsic threshold is decreased by adding Ce into alloy 8090, which results in a harmful influence on the growth resistance of long and short fatigue cracks for this alloy. CHEN Zheng,professor, Laboratory No.401, Northwestern Polytechnical University, Xi＇an 710072 Key words:  aluminum-lithium alloy      physically-short carck      threshold      closure effect      intrinsic growth resistance      Received:  18 August 1995      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1995/V31/I8/363 1VenkatesgwaraRaoKT,YuW,RichieRO．MetallTrans,1988;19:5612NichollsOJ,MartinJW．FatiFractEngMaterStruct,1990;13(1):833ChenZ．ChiJAero,1991;3804HeM,ChenZ．In:PetersM,WinklerPJeds．,Aluminium-Lithium,AlleRechteVorbehaltenFRC:DGMInformmbH,1992:5635ChenZ,HeM．In:PetersM．NinklerPJeds．,Aluminum-Lithium,AlleRechteVorbehaltenFRC:DGMInformmbH,1992:445 [1] LI Xiaolin, LIU Linxi, LI Yating, YANG Jiawei, DENG Xiangtao, WANG Haifeng. Mechanical Properties and Creep Behavior of MX-Type Precipitates Strengthened Heat Resistant Martensite Steel[J]. 金属学报, 2022, 58(9): 1199-1207. [2] Man YAO, Wei CUI, Xudong WANG, Haixuan XU, S R PHILLPOT. MOLECULAR DYNAMICS SIMULATION OF INITIAL RADIATION DAMAGE IN TUNGSTEN[J]. 金属学报, 2015, 51(6): 724-732. [3] ZHU Mingliang XUAN Fuzhen ZHU Kuilong WANG Guozhen JIA Tianyao. EFFECT OF HEAT TREATMENT ON FATIGUE BEHAVIOR OF 25Cr2NiMo1V STEEL[J]. 金属学报, 2009, 45(3): 320-325. [4] YU Huichen; ZHANG Yanji; SUN Yanguo; XIE Shishu; TANAKA Keisuke. Near Threshold Fatigue Crack Growth Behavior in Stainless Steel[J]. 金属学报, 2005, 41(7): 721-726 . [5] CHU Wuyang; LU Rongbang;QIAO Lijie; WANG Yanbin (Department of Materials Physics; University of Science & Technology Beijing; Beijing 100083)CHENG Yihuan; CHEN Hongxing(Baoshan Iron and Steel Corporation; Shanghai 201900);GUAN Yongsheng; YAN Yinglong; SUN Wei(Tianjin Steel Pipe Corporation; Tianjin 300310)Correspondent:CHU Wuyang; professor Tel: (010)62332906; Fax: (010)62327283;E-mail: ljqiao@public.bta.net.cn. THE THRESHOLD STRESS FOR HYDSOGEN-INDUCED CRACKING OF C90 TUBULAR STEELS[J]. 金属学报, 1998, 34(10): 1077-1083. [6] CHEN Wenzhe;ZHANG Sa;QIAN Kuangwu (Department of Materials; Fuzhou University; Fuzhou 350002)GU Haicheng (Institute of Materials; Xi'an Jiaotong University; Xi'an 710049)WANG Zhongguang (State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015). FATIGUE CRACK GROWTH RATES AND FATIGUE THRESHOLDS OF CENTRIFUGAL SPRAY DEPOSITED Ti-48Al-2Mn-2Nb[J]. 金属学报, 1998, 34(1): 70-74. [7] LUO Jingxi; TONG Mingxin(State Key Laboratory for Mechanical Behaviour of Materials; Xi'an Jiaotong University; Xi'an 710049)(Manuscript received 1995-10-20; in revised form 1996-02-02). EFFECTS OF COTTRELL ATMOSPHERE ON INITIAL YIELD STRESS AND FATIGUE THRESHOLD OF STEEL 20CrMO[J]. 金属学报, 1996, 32(8): 834-838. [8] ZHENG Yesha; WANG Zhongguang; AI Suhua (State Key Laboratory of Fatigue and Fracture for Materials; Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110015). DISLOCATION STRUCTURE OF FATIGUE CRACK TIP[J]. 金属学报, 1995, 31(3): 105-114. [9] WANG Zhongguang;AI Suhua State Key Laboratory of Fatigue and Fracture for Materials; Institute of Metal Research; Academia Sinica; ShenyangZHENG Yessha;post-doctoral.Shanghai Institute of Coramics.Academia Sinica.Shnaghai 300050. ROUGHNESS-INDUCED SHEAR RESISTANCE OF MODE Ⅱ CRACK GROWTH[J]. 金属学报, 1993, 29(6): 13-21. [10] TIAN Baohong;ZHENG Shi'an;WU Lei Luoyang Institute of Technology associate professor;Department of Materials Engineering;Luoyang Institute of Technology; Luoyang 471039. FATIGUE BEHAVIOUR OF M/B DUPLEX STRUCTURE IN A HIGH CARBON Cr-Mo-W STEEL[J]. 金属学报, 1993, 29(3): 46-50. [11] CHEN Jianqiao Huazhong University of Science and Technology; Wuhan. SMALL CRACK PROPAGATION THRESHOLD OF CARBON TOOL STEEL UNDER COMBINED STRESSES[J]. 金属学报, 1993, 29(10): 33-39. [12] WANG Zhongguang;ZHANG Yun;HU Zhuangqi;HE Shiyu;LI Qingjian State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; Academia Sinica; Shenyang Harbin Institute of Technology; Correspendent profersor; Insitute of Research; Acodemia Sinica; Sheyang 110015. FATIGUE CRACK PROPAGATION IN Al-Li ALLOY 8090[J]. 金属学报, 1992, 28(5): 44-50. [13] ZHENG Yesha;WANG Zhongguang;AI Suhua State Key Laboratory of Fatigue and Fracture for Materials; Institute of Metal Research; Academia Sinica; Shenyang. MICROFRACTOGRAPHY OF NEAR-THRESHOLD FATIGUE CRACK PROPAGATION IN DUAL PHASE STEELS[J]. 金属学报, 1992, 28(4): 34-39. [14] LI Yongjun Xi'an Jiaotong University. FATIGUE FRACTURE BEHAVIOUR OF LOWCARBON MARTENSITE AND MARTENSITE/ BAINITE DUPLEX STRUCTURE IN 20CrMnMo STEEL[J]. 金属学报, 1991, 27(6): 70-75. [15] CHENG Yuren;SHI Xiaofeng;PENG Xiang;HOU Binglin Northern Jiaotong University; Beijing. DETERMINATION OF FATIGUE CRACK CLOSURE EFFECT BY COMPLIANCE TECHNIQUE AND NUMERICAL METHOD[J]. 金属学报, 1991, 27(4): 43-48. No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed