Microstructure and Mechanical Properties of Nb and V Microalloyed TRIP-Assisted Steels

被引：8

作者：

Oja, Olli ^{[1
]}

Saastamoinen, Ari ^{[2
]}

Patnamsetty, Madan ^{[2
]}

Honkanen, Mari ^{[3
]}

Peura, Pasi ^{[2
]}

Jarvenpaa, Martti ^{[1
]}

机构：

[1] SSAB Europe Oy, Prod Dev, Harvialantie 420, Hameenlinna 13300, Finland

[2] Tampere Univ, Mat Sci & Environm Engn, Korkeakoulunkatu 6, Tampere 33720, Finland

[3] Tampere Univ, Tampere Microscopy Ctr, Korkeakoulunkatu 3, Tampere 33014, Finland

来源：

METALS | 2019年 / 9卷 / 08期

关键词：

steel; martensite; austenite; microalloying; dilatometry; true fracture strain; TRANSFORMATION-INDUCED PLASTICITY; RETAINED AUSTENITE; PHASE-TRANSFORMATION; MULTIPHASE STEELS; SI; AL; DUCTILITY; PRECIPITATION; ENHANCEMENT; STABILITY;

D O I：

10.3390/met9080887

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The intercritical annealing and isothermal bainitic processing response was studied for three Nb and V microalloyed Transformation-Induced Plasticity (TRIP)-assisted 980 MPa grade steels. Their mechanical and microstructural properties were compared to industrially produced TRIP 800 steel. Depending on the isothermal holding temperature and microalloying, the experimental steels reached properties comparable to the reference steel. The retained austenite content did not show direct correlation to elongation properties. Niobium was found to be more effective microalloying element than vanadium in increasing the elongation properties, which were investigated by measuring true fracture strain from tensile test specimens.

引用

页数：20

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