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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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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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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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 pretreated microstructure on the morphology and mechanical properties of low-carbon steel with IQ&P treatment [PDF]
, 2016 The effects of pretreated microstructure on the multiphase microstructure features at room temperature and the mechanical properties of low-carbon steel were studied by the treatment of water cooling after hot-rolling in the γ phase region or in the γ ...
CHEN Lian-sheng +5 more
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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
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Effect of gas pressure on microstructure and mechanical properties of TC11 titanium alloy during supersonic fine particle bombardment [PDF]
, 2023 The surface nanocrystallization of a Ti–6.5Al–3.5Mo–1.5Zr–0.3Si (TC11) titanium alloy with a lamellar microstructure was carried out by supersonic fine particle bombardment (SFPB). The effect of SFPB gas pressure on its surface integrity, microstructural
CAO, Wei +6 more
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Experimental investigation of Phase Equilibria of Partial Ternary systems with Rhenium [PDF]
, 2016 摘要 镍基高温合金具有高强度、优良的耐热性和良好的耐腐蚀性，被广泛应用于航空航天、国防军事、核能等重要领域。迄今为止，镍基高温合金的添加元素达到了十多种，熔点高、原子半径大的元素如Co，Re，Ru，Mo，W等的添加，能起到很好的固溶强化作用，改善高温力学性能。然而高熔点元素的过量添加导致拓扑密排相的产生，降低镍基高温合金的疲劳寿命、塑性、韧性等力学性能。相图作为合金设计的基础，能够很好的指导镍基高温合金的成分设计。然而，由于Re，Ru，W等元素价格贵，熔点高，对其进行实验研究比较困难。截至目前，由Co ...
杨晓锋
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