Precipitated Phase of Titanium Alloy with Adding Nd Elements [PDF]
, 2017 通过粉末冶金方法(冷等静压-真空烧结)制备钛合金Ti-6Al-4V-2Cr-1Nd, 经过固溶-时效热处理后, 利用光学显微镜(OM)、; X射线衍射仪(XRD)和透射电镜(TEM)分析合金的微观组织、 物相的组成及析出相的形核特点, 研究添加稀土元素Nd对析出相的影响。; 实验结果表明,在添加1%Nd(质量分数)元素后, 钛合金组织得到了明显细化;通过合金细化成核理论分析发现, 添加稀土元素Nd后,; 固溶时效中Nd_2O_3可以作为形核的基础, 促进形核, 所以稀土Nd元素可以有效促进非均匀形核 ...
史士钦 +4 more
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Effects of Nd element addition on microstructure and mechanical properties of Ti-6Al-4V-2Cr alloy [PDF]
, 2017 本试验采用冷等静压法及粉末冶金法制备钛合金,消除了成分偏析对合金性能的影响。在Ti-6Al-4V-2Cr中加入稀土Nd元素并进行热处理,运用光学; 显微镜、XRD和TEM对其组织和性能进行观察和分析。通过观察发现合金的组织为均匀的alpha +; beta相。运用XRD和TEM观察发现,晶界和晶内均有Nd_2O_3析出物,Nd_2O_3的出现细化了晶粒,提高了形核率,降低了晶粒尺寸。运用精; 密万能试验机进行了力学性能测试,当Nd元素含量为1%时,合金的综合力学性能最好,合金的抗拉强度提高了10.7 ...
刘冀尧 +6 more
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Effect of arc re-melting on microstructure, mechanical and tribological properties of commercial 390A alloy [PDF]
, 2021 To investigate the effect of the arc re-melting on the microstructure, mechanical and tribological properties of the 390A alloy, its ingot produced by the conventional induction melting method was subjected to the arc re-melting process.
Hekimoğlu, Ali Paşa, Çalış, Merve
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Influence of vanadium on the microstructure refinement of high strength automobile beam steel [PDF]
, 2016 The effects of vanadium on the microstructure refinement of automobile beam steel with a yield strength of 700 MPa were investigated by Gleeble-3500 Thermo Simulator, scanning electron microscopy, transmission electron microscopy and electron back ...
HE Yu-tian +5 more
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Microstructure and susceptibility to hot tearing of K424 nickel-based superalloys for turbocharger turbine wheels [PDF]
, 2016 Hot tearing tends to occur when K424 superalloy is used for a turbocharger turbine wheel. To solve this problem,the alloy characteristics of K424 and K418 superalloys and the factors impacting the susceptibility to hot tearing were studied by ...
DONG Jian-xin +4 more
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Hot ductility of Fe-36Ni invar alloy [PDF]
, 2016 The hot ductility behaviors of Fe-36Ni alloy in the temperature range of 900-1200 ℃ were investigated by using a Gleeble-3800 thermal simulator. The influence factors and mechanism of action on the hot ductility were systematically analyzed by FaetSage ...
HE Yu-tian +5 more
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High-temperature fracture toughness of high Nb-containing TiAl alloys [PDF]
, 2016 The fracture toughness of a nearly lamellar Ti-45Al-8Nb-0.2W-0.2B-0.1Y alloy and a fully lamellar Ti-45Al-7Nb-0.2W-0.2Hf-0.3B-0.15 C alloy at 750℃ was investigated by prefabricating a fatigue crack in the compact tension(CT) specimen,and the ...
JIAO Ze-hui +4 more
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Effect of TMCP on the microstructure and mechanical properties of Si-Mn series hainitic steel [PDF]
, 2016 The effects of two different thermomechanical control processes (TMCP) including medium temperature slow cooling and medium temperature isothermal treatment after roiling on the microstructure and mechanical properties of Si-Mn series bainitic steel were
HU Shui-ping, LI Ming-bao
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Phase Diagram of Lead-free Brass Systems and Their Applications in Morphological Design of Bi-containing Brass [PDF]
, 2015 由于铅黄铜具备优异的耐磨性、耐化学腐蚀和切削性，因而常被用于制造阀门、水管以及散热器等。近年来随着人们对自身健康的关注以及环保意识的不断加强，有铅黄铜的无铅化已经是黄铜业的一个行业趋势。新型无铅黄铜的发展俨然已成为黄铜行业一个迫切的目标。相图是材料设计的基本指南，可以对合金成分、制备工艺提供指导,并在一定程度上对合金的组织进行预测。本研究主要利用合金法实验测定了Cu-Zn-Sn，Sn-Sb-Zn，Sn-Sb-Cu三元系在不同温度全成分范围内的等温截面相图。本研究取得的主要研究成果如下： (1)通过合金法，
许叶潞
core
Influence of tempering times on the mechanical properties of P91 weld joints [PDF]
, 2017 The P91 weld joint used in the experiment is re-tempered according to the heat treatment process. The effect of tempering times on its mechanical properties, including that at room temperature and high temperature, was then investigated in relation to ...
CUI Zheng +5 more
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