Liu R, Zhang Z J, Li L L, An X H, Zhang Z F
ShenyangNational Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, P. R. China.
Sci Rep. 2015 Apr 1;5:9550. doi: 10.1038/srep09550.
In this study, the concept of "twinning induced plasticity (TWIP) alloys" is broadened, and the underlying intrinsic microscopic mechanisms of the general TWIP effect are intensively explored. For the first aspect, "TWIP copper alloys" was proposed following the concept of "TWIP steels", as they share essentially the same strengthening and toughening mechanisms. For the second aspect, three intrinsic features of twinning: i.e. "dynamic development", "planarity", as well as "orientation selectivity" were derived from the detailed exploration of the deformation behavior in TWIP copper alloys. These features can be considered the microscopic essences of the general "TWIP effect". Moreover, the effective cooperation between deformation twinning and dislocation slipping in TWIP copper alloys leads to a desirable tendency: the synchronous improvement of strength and plasticity (SISP). This breakthrough against the traditional trade-off relationship, achieved by the general "TWIP effect", may provide useful strategies for designing high-performance engineering materials.
在本研究中，“孪生诱导塑性（TWIP）合金”的概念得到了拓展，并深入探究了一般TWIP效应潜在的内在微观机制。对于第一个方面，在“TWIP钢”的概念之后提出了“TWIP铜合金”，因为它们具有基本相同的强化和增韧机制。对于第二个方面，通过对TWIP铜合金变形行为的详细探究，得出了孪生的三个内在特征，即“动态发展”“平面性”以及“取向选择性”。这些特征可被视为一般“TWIP效应”的微观本质。此外，TWIP铜合金中变形孪生与位错滑移之间的有效协同作用导致了一种理想的趋势：强度和塑性的同步提高（SISP）。由一般“TWIP效应”实现的这一突破传统权衡关系的成果，可能为设计高性能工程材料提供有用的策略。
