Comparison of the effects of silicon and aluminium on the tensile behaviour of multiphase trip-assisted steels
Comparison of the effects of silicon and aluminium on the tensile behaviour of multiphase trip-assisted steels
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DOI：
10.1016/s1359-6462(00)00697-7
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发表时间：
2001-04-01
影响因子：
6
通讯作者：
Van Humbeeck, J
中科院分区：
文献类型：
--
作者：
Girault, E;Mertens, A;Van Humbeeck, J
多相TRIP辅助钢是新一代低合金高强度钢，具有出色的成形性[1]。显著的强度与延展性平衡是由于在测试过程中发生了相变诱导塑性（TRIP）现象[2]，该现象涉及奥氏体向马氏体的应变诱导相变。在初始显微组织中奥氏体的存在似乎是实现所需性能的关键。奥氏体的保持通常通过适当的化学和典型的热处理的组合效果来获得。在这方面，已知硅和铝都可以延迟碳化物形成的动力学，从而有利于通过贝氏体保持阶段的奥氏体稳定化[3]。尽管有这种定性知识，但几乎没有文献严格比较硅和铝对奥氏体保留、TRIP效应程度和所得拉伸行为的影响，所有其他化学成分保持不变[4]。本文的目的是定量评估铝和硅含量的影响，鉴于多相TRIP辅助钢的发展。
Multiphase TRIP-assisted steels are a new generation of low alloy high strength steels that exhibit exceptional formability [1]. The remarkable strength to ductility balance results from the occurrence during testing of the Transformation Induced Plasticity (TRIP) phenomenon [2], which involves the strain-induced transformation of austenite to martensite. The presence of austenite in the initial microstructure appears to be critical to the achievement of the desired properties. The retention of austenite is usually obtained by the combined effect of an appropriate chemistry and a typical heat-treatment. In this respect, it is known that silicon and aluminium may both retard the kinetics of carbide formation and thus favour the austenite stabilisation by a bainitic holding stage [3]. Despite this qualitative knowledge, very little literature can be found that rigorously compares the effect of silicon and aluminium on the austenite retention, on the extent of the TRIP effect, and on the resulting tensile behaviour, all other chemical constituents have been kept constant [4]. The objective of this paper is to quantitatively assess the influence of aluminium and silicon contents, in view of the development of multiphase TRIP-assisted steels.