Influence of Alternating Short-Cycle Bending on the Mechanical Properties of Copper, α-Titanium and the Mild Steel DC01

Influence of Alternating Short-Cycle Bending on the Mechanical Properties of Copper, α-Titanium and the Mild Steel DC01
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交替短周期弯曲对铜、α-钛和低碳钢DC01力学性能的影响

DOI:
10.1007/s11665-019-04458-5
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发表时间:
2019
影响因子:
2.3
通讯作者:
Nürnberger
Nürnberger
中科院分区:
材料科学4区
文献类型:
--
作者:
Barienti;Herbst;Nürnberger

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在轧辊矫直过程中发生的交变弯曲载荷对金属板力学性能的影响尚未完全了解。在设计具有窄加工窗口的后续工艺时,尤其需要详细了解常用的整平工艺对板材最终性能的影响。为了研究与辊矫直相似的加载条件下的力学性能变化,对低碳钢DC01、α-钛和纯铜(CU-DHP)的薄板试样进行了不同幅度的交替弯曲载荷,弯曲次数高达9.5次。根据voice描述,DC01深冲钢的各向同性硬化行为与每周期施加的载荷振幅有很强的依赖性。α-钛的强化行为也与加载幅度有关。相比之下,纯铜的变化较小,有软化的趋势。对于所有三种材料,在一次弯曲循环后,回弹都发生了变化。
The influence of alternating bending loads as they occur during roller levelling on the mechanical properties of sheet metals is not yet fully understood. A detailed knowledge of the influence of the commonly used levelling process on the resulting properties of sheet material is needed in particular for the design of subsequent processes with narrow process windows. To investigate the mechanical property changes during loading conditions similar to roller levelling, sheet samples of mild steel DC01, α-titanium and pure copper (CU-DHP) were subjected to alternating bending loads with different amplitudes for up to 9.5 bending cycles. An isotropic hardening behavior according to a Voce description could be shown for the DC01 deep drawing steel with a strong dependence on the load amplitude applied per cycle. A strengthening behavior that depends on the loading amplitude could be observed for α-titanium as well. In contrast, pure copper featured minor changes with a tendency to soften. For all three materials, changes in springback were present after one bending cycle.
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