Towards understanding the brittle–ductile transition in the extreme manufacturing
Towards understanding the brittle–ductile transition in the extreme manufacturing
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DOI：
10.1088/2631-7990/abdfd7
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发表时间：
2021-01
影响因子：
14.7
通讯作者：
Tao Zhang;F. Jiang;Hui Huang;Jing Lu;Yueqin Wu;Zhengyi Jiang;Xipeng Xu
中科院分区：
文献类型：
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作者：
Tao Zhang;F. Jiang;Hui Huang;Jing Lu;Yueqin Wu;Zhengyi Jiang;Xipeng Xu
脆韧转变广泛存在于极小变形量的制造、热辅助加工和高速加工中。本文综述了极限制造中的BDT。分析了极限加工中影响BDT的因素，包括变形规模和变形温度引起的脆韧转变，以及晶粒尺寸和应变速率引起的反向转变。讨论了BDT的机理以及如何在BDT的基础上改善切削性能。提出脆性与延性的相互转化是塑性变形的发生与裂纹扩展的竞争的结果。被加工材料的脆性或塑性应有利于特定的制造工艺，这可以通过变形程度、变形温度和加工速度来调节。
The brittle–ductile transition (BDT) widely exists in the manufacturing with extremely small deformation scale, thermally assisted machining, and high-speed machining. This paper reviews the BDT in extreme manufacturing. The factors affecting the BDT in extreme manufacturing are analyzed, including the deformation scale and deformation temperature induced brittle-to-ductile transition, and the reverse transition induced by grain size and strain rate. A discussion is arranged to explore the mechanisms of BDT and how to improve the machinability based on the BDT. It is proposed that the mutual transition between brittleness and ductility results from the competition between the occurrence of plastic deformation and the propagation of cracks. The brittleness or ductility of machined material should benefit a specific manufacturing process, which can be regulated by the deformation scale, deformation temperature and machining speed.