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首页> 外文期刊>Metallurgical and Materials Transactions A >Austenite Stability Effects on Tensile Behavior of Manganese-Enriched-Austenite Transformation-Induced Plasticity Steel
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Austenite Stability Effects on Tensile Behavior of Manganese-Enriched-Austenite Transformation-Induced Plasticity Steel

机译：奥氏体稳定性对富锰-奥氏体相变诱发塑性钢拉伸行为的影响

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摘要

Manganese enrichment of austenite during prolonged intercritical annealing was used to produce a family of transformation-induced plasticity (TRIP) steels with varying retained austenite contents. Cold-rolled 0.1C-7.1Mn steel was annealed at incremental temperatures between 848 K and 948 K (575 °C and 675 °C) for 1 week to enrich austenite in manganese. The resulting microstructures are comprised of varying fractions of intercritical ferrite, martensite, and retained austenite. Tensile behavior is dependent on annealing temperature and ranged from a low strain-hardening “flat” curve to high strength and ductility conditions that display positive strain hardening over a range of strain levels. The mechanical stability of austenite was measured using in-situ neutron diffraction and was shown to depend significantly on annealing temperature. Variations in austenite stability between annealing conditions help explain the observed strain hardening behaviors.
机译：在长时间的临界退火过程中，奥氏体的锰富集被用于生产一系列具有变化的残余奥氏体含量的相变诱发塑性（TRIP）钢。将0.1C-7.1Mn冷轧钢在848 K和948 K（575°C和675°C）之间的升高温度下退火1周，以富集锰中的奥氏体。所得的显微组织由不同比例的临界铁素体，马氏体和残余奥氏体组成。拉伸行为取决于退火温度，范围从低应变硬化“平坦”曲线到高强度和延展性条件，这些条件在一定应变水平范围内显示出正应变硬化。使用原位中子衍射法测量了奥氏体的机械稳定性，并且显示出其显着依赖于退火温度。退火条件之间奥氏体稳定性的变化有助于解释观察到的应变硬化行为。

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