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of as-cast and forged high Nb-TiAl based alloy 3.2 合金的蠕变性能 锻造态与铸造态高Nb-TiAl合金在800℃/220MPa条件下的蠕变曲线如图2所示,可见经过锻造的高Nb-TiAl合金蠕变寿命减小,蠕变应变增加.表明锻造工艺提高了合金的高温塑性,但未能改善合金的高温蠕变性能. 图2 铸造态与锻造态高Nb-TiAl合金在800℃/220MPa条件下的蠕变曲线 Fig.2 Creep curves of forged and as-cast high Nb-TiAl alloy at the conditions of 800℃/220MPa 锻造态高Nb-TiAl合金在800℃分别施加200MPa,220MPa,240MPa应力测定的蠕变曲线,如图3(a)所示.由图中曲线1可知,当施加应力为200MPa时,合金在蠕变初期的应变较小,蠕变中期的平......
of as-cast and forged high Nb-TiAl based alloy 3.2 合金的蠕变性能 锻造态与铸造态高Nb-TiAl合金在800℃/220MPa条件下的蠕变曲线如图2所示,可见经过锻造的高Nb-TiAl合金蠕变寿命减小,蠕变应变增加.表明锻造工艺提高了合金的高温塑性,但未能改善合金的高温蠕变性能. 图2 铸造态与锻造态高Nb-TiAl合金在800℃/220MPa条件下的蠕变曲线 Fig.2 Creep curves of forged and as-cast high Nb-TiAl alloy at the conditions of 800℃/220MPa . 锻造态高Nb-TiAl合金在800℃分别施加200MPa,220MPa,240MPa应力测定的蠕变曲线,如图3(a)所示.由图中曲线1可知,当施加应力为200MPa时......
Research on Ultrafine Tungsten Carbide-Cobalt (WC-Co) Cemented Carbide Rods of Miniature Drills for Highly Integrated Printed Circuit Board (PCB)Xiaoliang SHI, Gangqin SHAO, Xinglong DUAN... ultrafine tungsten carbide-cobalt (WC-Co) cemented carbide rods through vacuum sintering plus sinterhip technology. The microstructure, Vickers hardness, density and Rockwell A hardness (HRA......
match of high strength and high toughness. Key words: β titanium alloy; forged in two-phase region; inhomogeneity; precipitated phase; high strength and high toughness Foundation item: Project(2016GY-207......
Microstructure and tensile properties of containerless near-isothermally forged TiAl alloys HE Wei-wei1, 2, TANG Hui-ping1, LIU Hai-yan1, JIA Wen-peng1, LIU Yong2, YANG Xin1, 2 1. State Key... Received 30 July 2011; accepted 9 October 2011 Abstract: Ti-47Al-2Nb-2Cr-0.4(W, Mo) (mole fraction, %) alloy ingot fabricated using vacuum consumable melting was containerless near-isothermally forged......
rods were rotary forged. The influences of the rotary forging process on the relative density, hardness and microstructure of Mo-Ti-Zr alloy rods were investigated. The results are as follows... Jing-lian, CHENG Hui-chao, TIAN Jia-min, LU Ming-yuan (State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China) Abstract: Mo-Ti-Zr alloy rods with diameter of 28......
of Mg alloy rods and twisted samples 3 孪晶机制分析 3.1 Schmid行为 与滑移系启动一样,镁合金中的孪晶启动通常遵循Schmid定律,即所启动的孪晶变体对应着最大Schmid因子(SF)值[22-23].但在变形过程中,由于晶粒间协调变形机制的作用,有时候往往SF值低的孪晶变体先启动,甚至SF值为负的孪晶变体也能启动[24-27... magnesium alloy rods by combining pre-torsion deformation with subsequent annealing[J]. Materials Science & Engineering A, 2016, 650: 300-304. [17] HUA J Q, GAO H, MENG Y X. Effects of free-end......
ingots free of defects were cast in the laboratory. In order to obtain high performance forged suspension parts, the hot compression tests of the ingot were carried out. The results show that the subgrain fraction of the forged ingot was strongly affected by Zener-Hollomon parameters (Z parameters). The intermediate Z parameters, 1.09×1016 s-1, will contribute to the larger number fraction......
which could be easy applied in the case of steel alloys. In this work, the hot forged rods, commercially produced from 100Cr6 steel, were used. The first part of the work concerned the determination... reduction and heating to the temperature above the solidus point. In this work, the hot forged rods, commercially produced from 100Cr6 steel, were applied. In the SIMA method recrystallization takes......
structure of the forged product satisfy operating requirements. Key words: titanium alloy impeller; isothermal forging; deformation behavior; physical modeling 1 Introduction Due... and mechanical properties of the product were analyzed. 2 Deformation behavior Hot rolled commercial Ti-6.5Al-3.5Mo-1.5Zr-0.3Si alloy rods were used in this investigation. Table 1 shows the chemical......
