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Rapid manufacture of Ni-based superalloy components by three-dimensional printing LIU Jian-xin(刘建新), H. A. KUHN ProMetal Division, The Ex One Company, 8075 Pennsylvania Avenue, Irwin, PA 15642... of the fine powder particles or the solidus temperature if the fine powder is a prealloyed powder as well. This approach was successfully applied to sinter Ni-based superalloy 718 preforms, which were built......
mentioned oxides. A continuous α-Al2O3 layer is responsible for a slow growth rate of the scale after an initial rapid oxidation of NiO. Key words: single crystal Ni-based superalloy; oxidation... superalloys has been studied by some researchers[7-11]. LI et al[7-8] have reported that the oxidation resistance of a SC Ni-based superalloy exposed at 900-1 150 ℃ is higher than that at 800 ℃ because......
; Abstract: An 8 mm-high NiCoCrAlYTa coating was epitaxially built-up on a directionally solidified (DS) Ni-based superalloy blade tip by electro-spark deposition...-quality epitaxial MCrAlY coating can be produced by these ESD processing units on a Ni-based superalloy[6-7]. For the purpose of developing rebuilding process of the DS blade tip, a 8 mm-high NiCoCrAlYTa......
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is that the superalloy has excellent plasticity at high temperature. To study the creep behavior, the microstructure was observed by SEM and TEM. Different from other microstructure of Ni-base superalloys... operating materials[1]. Ni-base superalloy has excellent high-temperature strength and hot corrosion resistance with the addition of refractory elements such as W, Cr, Ta, Mo, Re, Ru, and has been used......
Finite element analysis of γ′-phase raft mechanism in Ni-based single crystal superalloy WU Wen-ping(吴文平), GUO Ya-fang(郭雅芳), WANG Yue-sheng(汪越胜) Institute of Engineering Mechanics... in a single crystal Ni-based superalloy with the [001] orientation. The results show that the creep and rafting are closely related with the stress and strain energy density distributions in the matrix......
alloys. Key words:Ni-based superalloy; low melting point constituents; liquation cracking; [全文内容正在添加中] ...THE EFFECT OF BORON AND CARBON ADDITION ON WELDABILITY OF DS TMS-75 SUPERALLOY M.C.Chaturvedi1,Y.L.WANG1,N.L.Richards1 (1.Department of Mechanical and Industrial Engineering, University of Manitoba......
DZ468合金高周疲劳性能研究刘恩泽1,郑志1,佟健1,宁礼奎1,管秀荣1(1.辽宁省沈阳市科学院金属研究所)摘 要:本文研究了新型镍基高温合金DZ468的高周疲劳性能.结果表明:当应力比R=-1时,在900和760℃条件下,DZ468合金的疲劳强度分别为290和300 MPa.DZ468合金的高周疲劳试样断口由疲劳源,疲劳区和瞬断区组成.裂纹在表面,次表面和内部缺陷部位萌生,裂纹扩展具有第Ⅰ和第Ⅱ阶段,随应力幅增加裂纹扩展速率增大.光滑试样的疲劳裂纹扩展方式与变形机制间存在一定的关系,位错的平面滑移,交滑移和......
定向凝固镍基高温合金DZ125平界面生长的微观组织演化闵志先1,沈军1,王灵水1,冯周荣1,刘林1,傅恒志1(1.陕西省西安市西北工业大学凝固技术国家重点实验室)摘 要:采用液态金属冷却(LMC)定向凝固技术,对镍基高温合金DZ125在凝固速率为1.5μm/s的条件下其平界面生长的微观组织演化规律进行了研究.结果表明:凝固组织演化经历3个不同的阶段,当凝固分数fs≤0.26时,为单相γ组织,基体中零星分布着细小的颗粒状的未熔HfC;当0.26<fs<0.86时,为γ/MC共生组织,MC为纤维状或者板......