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《Chinese Journal of Lasers》 2012-08
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Microstructures and Mechanism of Cracks Forming of Rene 80 High-Temperature Alloy Fabricated by Laser Rapid Forming Process

Xi Mingzhe Gao Shiyou(College of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China)  
The microstructures and mechanism of cracks forming of a thick-wall part of Rene 80 superalloy fabricated by laser rapid forming(LRF) process are presented.Results show that the solidified microstructures of LRF Rene 80 high-temperature alloy consist of directionally solidified dendrites,which are parallel with the deposition direction.The MC type carbides and γ-γ′ eutectic distribute in interdendritic region of the directionally solidified microstructure due to element segregation.The LRF Rene 80 high-temperature alloy thick-wall part contains many macro cracks,which have the length of more than 10 mm and expand along the direction parallel to the deposition direction.Analyses indicate that these macro cracks are liquated cracks.During LRF process,the γ-γ′ eutectic with lower melting point particularly along the grain-boundary regions in heat-affected zone(HAZ) melt produced by laser melting pool and result in the formation of grain-boundary liquid.On the subsequent cooling process of the HAZ,the liquated cracks along the HAZ grain boundaries occurred by decohesion across the liquid-solid interface due to shrinkage stresses of solid phase in HAZ,while the liquated γ-γ′ eutectic is still liquid.
【Fund】: 国家自然科学基金(50871022)资助课题
【CateGory Index】: TG665
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【Citations】
Chinese Journal Full-text Database 4 Hits
1 Zhao Xiaoming,Chen Jing,He Fei,Tan Hua,Huang Weidong(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China);The Cracking Mechanism of Rene88DT Superalloy by Laser Rapid Forming[J];Rare Metal Materials and Engineering;2007-02
2 SUN Hong-qing, ZHONG Min-lin, LIU Wen-jin, HE Jin-jiang, LI Xiao-li, ZHU Xiao-feng(Laser Processing Research Centre, Mechanical Engineering Department,Tsinghua University, Beijing 100084, China);Cracking Sensitivity on Laser Cladding Inconel 738 on Directionally Solidified Ni-base Superalloy[J];Journal of Aeronautical Materials;2005-02
3 Wu Xiaoyu Lin Xin Lü Xiaowei Yang Haiou Chen Jing Huang Weidong(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi′an,Shaanxi 710072,China);Study on Microstructure and Mechanical Properties of Laser Solid Forming 17-4 PH Stainless Steel[J];Chinese Journal of Lasers;2011-02
4 Xi Mingzhe Gao Shiyou(College of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China);Research on Tensile Properties of Inconel 718 Superalloy Fabricated by Laser Rapid Forming Process[J];Chinese Journal of Lasers;2012-03
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 XIE Yu-jiang,WANG Mao-cai,WANG Ming-sheng (State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016);Recent Status of Surface Treatment of Ni-based Superalloys with High Al and Ti Content by Laser and Electrospark Fusion Welding Process and the Way to Solve Welding Cracking[J];China Surface Engineering;2010-05
2 Zhao Xiaoming, Chen Jing, He Fei, Lin Xin, Huang Weidong (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China);Study on the Age-Harding Mechanism of Rene′88DT Superalloy by Laser Rapid Forming[J];Rare Metal Materials and Engineering;2007-12
3 Zhao Xiaoming1,2,Gong Shuili2,Lin Xin1,Chen Jing1,Huang Weidong1(1.State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China)(2.Science and Technology on Power Beam Processes Laboratory,BAMTRI AVIC,Beijing 100024,China);Coarsening Behavior of γ' Precipitates in Laser Solid Forming Rene88DT Superalloy during High Temperature Treatment[J];Rare Metal Materials and Engineering;2012-04
4 LIU Haiqing1,LIU Xiubo1,MENG Xiangjun1,ZHENG Chen1,SUN Chengfeng1, WANG Mingdi1,QI Longhao2(1 School of Mechanical and Electric Engineering,Soochow University,Suzhou 215021;2 State Key Laboratory of New Ceramics and Fine Processing,Tsinghua University,Beijing 100084);Crack Formation Mechanism and Controlling Methods of Laser Clad Ceramic Matrix Composite Coatings on Metal Substrate[J];Materials Review;2013-11
5 LI Chao,LIANG Yuanyuan,SHEN Canduo,ZHU Sheng (National Defence Key Laboratory for Remanufacturing,Academy of Armored Forces Engineering,Beijing 100072,China);Cracking formation mechanism of mild steel parts fabricated by surfacing rapid forming[J];Transactions of the China Welding Institution;2010-09
6 WANG Wei-fu1,2,WANG Mao-cai2(1.Key Laboratory of Special Purpose Equipment and Advanced Processing Technology(Zhejiang University of Technology),Ministry of Education,Hangzhou 310014,China;2.State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China);Directionally deposited microstructures prepared by laser cladding + electrospark deposition[J];Infrared and Laser Engineering;2010-04
7 ZHOU Xiao-wei~(1,2),CHAO Ming-ju~1,YANG-kun~11.Department of physics and Key Lab.of Material Physics of Ministry of Education,Zhengzhou University,Zhengzhou 450052,China;2.Department of physics,Zhengzhou Teachers'College,Zhengzhou 450044,China;Effect of Al_2O_3 on the microstructure and wear properties of laser-clad Ni60 alloy coatings[J];Laser Journal;2006-05
8 Wang Jun Lin Xin Huang Chunping Yang Haiou Huang Weidong(State Key Laboratory of Solidification Processing,Northwestern Polytechnic University, Xi′an,Shaanxi 710072,China);Influence of Aging Treatment on the Microstructure and Properties of 17-4PH Alloy by Laser Rapid Forming[J];Chinese Journal of Lasers;2011-12
9 Xi Mingzhe Gao Shiyou(College of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China);Heat-Treated Microstructures and Mechanical Properties of TA15 Titanium Alloy Fabricated by Laser Rapid Forming[J];Chinese Journal of Lasers;2012-01
10 Luo Xinmin1 Zhao Guangzhi1 Yang Kun1 Chen Kangmin1,3 Zhang Xiaoning1 Zhang Yongkang2 Luo Kaiyu2 Ren Xudong2 1School of Materials Science and Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China 2School of Mechanical Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;Deformation Microstructure Characteristics of Commercial Pure Titanium Sheet Induced by Laser Shock Forming[J];Chinese Journal of Lasers;2012-06
【Secondary Citations】
Chinese Journal Full-text Database 10 Hits
1 LIN Xin, XUE Lei, CHEN Jing, ZHANG Shuang-yin, HUANG Wei-dong (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072);Microstructure and Mechanical Properties of Laser Forming Repaired Ti-6Al-4V Alloy Component[J];China Surface Engineering;2009-01
2 HUANG Wei dong ,LI Yan min,FENG Li ping,CHEN Jing,YANG Hai ou,LIN Xin (National Key Laboratory of Solidification Processing, Northwestern Polytechnic University , Xi'an 710072,China);Laser Solid Forming of Metal Powder Materials[J];Journal of Materials Engineering;2002-03
3 Yang Jian, Chen Jing, Yang Haiou, Lin Xin, Huang Weidong (State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China);Experimental Study on Residual Stress Distribution of Laser Rapid Forming Process[J];Rare Metal Materials and Engineering;2004-12
4 ZHANG Wei,YAO Jian-hua,DONG Chen-hui,TANG Xiao-dan,PENG Wei(MOE's Key Laboratory of Mechanical Manufacture and Automation,Zhejiang University of Technology,Hangzhou 310014,China);Repairing and Strengthening of Eroded Turbine Blades by Laser Technology[J];Journal of Power Engineering;2008-06
5 ZOU Hong1,WANG Jun2,LI Cong1,ZUO Ru-lin3,QIU Shao-yu1,SHEN Bao-luo2 (1. National Key Laboratory of Nuclear Fuel and Materials,Nuclear Power Institute of China,Chengdu,610041,China; 2.School of Materials Science and Engineering,Sichuan University,Chengdu,610064,China; 3. School of Materials Science and Engineering,Chongqi University,400044,China);Study on Microstructure Transformation of 17-4PH Stainless Steel after Long-Term Aging at 350℃[J];Nuclear Power Engineering;2005-04
6 CHEN Rong zhang SHE Li ZHANG Hong wei WANG Luo bao(Institute of Aeronautical Materials, Beijing 100095,China);Investigation of directionally solidified alloy DZ125[J];Journal of Aeronautical Materials;2000-04
7 CHEN Jing, YANG Hai-ou, YANG Jian, HUANG Wei-dong (State Key Laboratory of Solidification Processing, Northwestern Polytechnic University, Xi'an 710072, China );Technical study on the laser rapid forming of Rene95 superalloy and TC4 titanium alloy[J];Journal of Aeronautical Materials;2003-S1
8 YU Jun, CHEN Jing, TAN Hua, HUANG Wei-dong(State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, Shaanxi 710072,China);Effect of Process Parameters in the Laser Rapid Forming on Deposition Layer[J];Chinese Journal of Lasers;2007-07
9 JIA Wen-peng1,2,LIN Xin1,CHEN Jing1,YANG Hai-ou1,ZHONG Cheng-wen2,HUANG Wei-dong11State Key Laboratory of Solidification Processing,2Center for High Performance Computing,Northwestern Polytechnical University,Xi'an,Shaanxi 710072,China;Temperature/Stress Field Numerical Simulation of Hollow Blade Produced by Laser Rapid Forming[J];Chinese Journal of Lasers;2007-09
10 Zhao Weiwei Lin Xin Liu Fencheng Zhao Xiaoming Chen Jing Huang Weidong (State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an,Shaanxi 710072,China);Effect of Heat Treatment on Microstructure and Mechanical Properties of Laser Solid Forming Inconel 718 Superalloy[J];Chinese Journal of Lasers;2009-12
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