Results 61 to 70 of about 1,631 (150)
A micromechanically motivated uncoupled model for ductile fracture prediction [PDF]
, 2017 This paper is a contribution to the ductile fracture prediction by the proposal of a new uncoupled ductile fracture criterion. In the new criterion, two typical void deformation models were carefully considered, with the plastic strain increment regarded
Araujo Stemler Pedro Malaquias +2 more
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, 1984 本文用三点弯曲试样测定15MnVN钢在淬火和200℃低温回火状态下疲劳裂纹扩展速率。试验在循环载荷比R=0.5的恒幅条件下进行,并利用金属塑性变形在光滑表面上产生浮凸的现象,用相衬显微镜测定裂纹顶端单调塑性区尺寸。在平面应力状态下垂直于裂纹面方向的单调塑性区尺寸与相应的(K_(max)/σ_s)~2成正比,其比例系数为0.21。根据Rice循环塑性区尺寸与单调塑性区尺寸关系,得到垂直裂纹面方向的循环塑性区尺寸与相应裂纹扩展速率之间为一指数关系。在裂纹扩展过程中,相对裂纹尺寸a/W约等于0 ...
于桂清, 李禾, 邓蓉英
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Research and Thinking on the Establishment of Product Grade in Food Standard in China [PDF]
The establishment of a sound quality classification standard system in consumer goods, such as food, is conducive to promoting the upgrading of product standards.
DONG Yi-wei +3 more
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Teshugang, 2016 The effect of control of 50 t LF refining slag (FeO) , (MnO),/R,( CaO)/[(Al2O3) (SiO2) ] and (S) on [0] index, sulfur partition ratio and Mn/S has been tested and analyzed.
戴永刚
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Exploration and Process Optimization of Mixed Crystal Reasons in Steel SCR420H for Cold Forging Three-pins Shaft [PDF]
The wire cutting and corrosion of the three-pins shaft part were carried out， and the microstructure observation results showed that there was severe mixed crystal phenomenon in the area with the highest cold deformation rate of the three-pins shaft head.
Zhang Xuecheng, Yao Hailong, Li Zhongping
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Analysis on Fracture of Cold Drawn Spring Steel 60Si2MnA During Spring Manufacturing
Teshugang, 2015 The flowsheet of Φ11. 8 mm cold drawn spring steel (/% : 0. 58C, 1. 77Si, 0. 79Mn, 0. 15Cr, 0. 015P, 0. 005S) is 80 t LD-LF-VD-hot rolled Φ12 mm coil-cold drawing process.
曹杰, 丁朝晖
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, 1984 当前世界范围的能源紧张和金属材料的快速消耗,促使人们对复合材料产生越来越大的兴趣。在航空与宇航领域里,对碳、硼等高性能纤维复合材料的需求量日趋增加;在船舶、汽车、电气零件、民用设施等方面,纤维增强塑料的用量也很大 ...
张双寅
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Research Progress on Purification Technology for High-purity Quartz Sand [PDF]
High-purity quartz sand is a crucial building block for strategically important emergent sectors like semiconductors, photovoltaics, fiber optic communications, and new energy.
Huiyang LIU +5 more
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Analysis and Control of Macro Inclusion in Structural Steel Melting by EAF-LF-CC Process
Teshugang, 2007 The composition of macro inclusion in 20MnTiB steel and 45 steel melting by 70 t EAF-LF-CC flow sheet at Egang and ingredient of mold powder and refractory material for concasting process have been analyzed,and it is obtained that the macro inclusion
李冬生, 徐冠宇
doaj
Effect of Casting Slab Defect on Cold Draw Quality of SWRH82B Steel Wire Coil
Teshugang, 2007 The microstructure and composition of fracture during cold drawing failure of wire coil of SWRH82B stell (0.80~0.84C,0.75~0.85Mn,0.18～0.22Cr,0.015～0.035Al) produced by 280 mm×380 mm casting slab have been observed and analyzed by scanning electron ...
赵莉萍 +3 more
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