An investigation into the mechanical behavior of a new transformation-twinning induced plasticity steel

详细信息	查看全文 | 推荐本文 |

• 作者：Mostafa Eskandari ; ^{m.eskandari@ut.ac.ir} ; Abbas Zarei-Hanzaki ; Ali Marandi
• 刊名：Materials and Design
• 出版年：2012
• 期刊代码：56_02613069
• 类别：ms
• 出版时间：August, 2012
• 卷：39
• 期：Complete
• 页码：279-284
• 文件大小：2299 K

摘要

In recent years, the transformation-induced plasticity (TRIP) and twinning-induced plasticity (TWIP) steels have been the focus of great attention thanks to their excellent tensile strength-ductility combination. Accordingly the mechanical behavior of an advanced microalloyed TRIP-TWIP steel, the compression tests were conducted from 25 to 1000 掳C. This experimental steel shows a high compressive strength of 1280 MPa with the yield strength of 385 MPa as well as an outstanding strain hardening rate of about 14,000 MPa at the 25 掳C. In addition the results indicate that the plastic deformation in the range of 25-150 掳C is controlled by both the strain-induced martensite formation and mechanical twinning. However the mechanical twinning has been speculated as the only deformation mechanism in the temperature range of 150-1000 掳C. This as well has led to an outstanding grain refinement via grain partitioning. The occurrence of mechanical twinning at such high temperatures is a novel observation in this grade of TRIP-TWIP high manganese steels.