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首页> 外文期刊>International Journal of Materials Research >Tensile and fatigue properties of sub-microcrystalline ultra-low carbon steel produced by HPT-straining
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Tensile and fatigue properties of sub-microcrystalline ultra-low carbon steel produced by HPT-straining

机译：拉伸和疲劳性能sub-microcrystalline超低碳钢由HPT-straining

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摘要

The tensile and fatigue properties of ultra-low carbon steel after HPT-straining at a rotation-speed of 0.2 rpm under a compression pressure of 5 GPa were investigated. Elongated grains with 300 nm thickness and 600 nm length with high dislocation density were formed by the HPT-straining. The obtained Vickers microhardness was around 3.6 GPa. The engineering tensile strength of the HPT-processed ultra-low carbon steel for 5 and 10 turns was 1.9 GPa, which is similar to the value of maraging high-alloy steels. The elongation increased with strain (at 5 to 10 turns). The increase in elongation is caused by the reduction of the stress concentration due to the existence of continuously recrystallized grains. The fatigue strengths of HPT-processed specimens were twice as high as those of the 90% cold-rolled specimen in the low-cycle fatigue region, whereas in the high-cycle fatigue region the fatigue strengths were not so different due to the high notch sensitivity of the HPT-processed specimens.
机译：超低的拉伸和疲劳性能碳钢HPT-straining后旋转速度下0.2 rpm压缩5 GPa压力。谷物与300纳米厚度和长度600海里高的位错密度形成的HPT-straining。大约是3.6的绩点。强度HPT-processed超低碳钢5和10转1.9的绩点,这是类似于马氏体时效高合金的价值钢。5到10)。减少造成的压力由于存在的浓度连续再结晶颗粒。优势HPT-processed标本两次高达90%的冷轧试样在低循环疲劳地区,而在高疲劳区域的疲劳强度没有如此不同切口由于高灵敏度的HPT-processed标本。

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