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withincrease of elongations have been investigatedby using transmission electron microscopy. Inthe small elongation stage, the boundaries betweenferrite and carbide in this steel can releasedislocations..., and the interaction betweenthe dislocations moving to the carbides in everyslip plane occurs. Thereby, the dislocationtangles around the carbides can be formed.In the large elongation stage, the dislocationtangles......
Relationship between coupling ration and elongation length for fused tapered optical fiber couplers LI Wenjuan, ZHENG Yu, DUAN Jian, WANG Lijun, LI Jipan, L Wen (State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China) Abstract: In order to explore the relationship between coupling ration and elongation length for fused tapered optical fiber......
discrete and Mg5Gd phases mostly decomposed and dissolved.With hot extrusion,the grain size was refined to about 20 μm on average,and both the strength and elongation were greatly improved.After ageing at 523 K for 5 h,the strength of different extruded alloys largely increased but the elongation decreased.With the increase of neodymium content,the strength of the alloys at different states......
strength(TYS)increased from 64 MPa for pure Zn to 262 MPa for Zn-1Mg; the elongation increased from 14.3% for pure Zn to 25% for Zn-0.02Mg and then decreased to 5% for Zn-1Mg. For the alloys extruded at 300 ℃, as Mg content increased, the TYS increased from 67 MPa for pure Zn to 252 MPa for Zn-1Mg, while the elongation decreased from 11.7% to 2%. The alloy extruded at 200 ℃ exhibited higher TYS......
in the matrix might be harmful to the BH ability. For deformed specimens, baking resulted in a loss of uniform elongation, but there was no obvious decrease in uniform elongation for unprestrained......
was investigated.After single ageing(120℃,24 h),the tensile strength was 812.4 MPa and the elongation was 6.2%.After retrogression reaging(RRA),the tensile strength was 751.2 MPa and the elongation......
recrystallized coarse grain structure. A further increase in strength with only minor loss in total elongation has been achieved by a slight cold rolling of the composite structure, which also removes the small yield drop and Lüders elongation observed in the composite structure.关键词:......
of nodular cast irons. Tensile strength and elongation of obtained as-cast nodular cast iron with the composition of 3.9%C, 3.2%Si, 0.5%Mn are maximum of about 524.5N/mm2 and 19.8% accordingly. In the same nodular cast iron, but only with 0.1% Mn the silicon addition first increases after decreases elongation, impact toughness and hardness. But tensile strength changes to the opposite side.关键词:......
on the strength of the material but significantly affects the elongation.When the billet temperature is kept constant at room temperature,the elongation of the billets is up to 23%.The mechanical properties......
)in this experiment. The influence of ECAP pass number on ultimate strength(UTS),hardness and elongation was studied.The results show that during ECAP the number of sample passing through the channels is very important for mechanical properties and microstructure refinement.ECAP not only increases their plasticity and hardness but also leads to refined grain.But the elongation reduces from 17.5......
