Tensile Properties of Duplex UNS S32205 and Lean Duplex UNS S32304 Steels and the Influence of Short Duration 475 °C Aging

被引：11

作者：

Maior Tavares, Sergio Souto ^{[1
]}

Pardal, Juan Manuel ^{[1
]}

Gomes de Abreu, Hamilton Ferreira ^{[2
]}

Nunes, Cristiana dos Santos ^{[2
]}

da Silva, Manoel Ribeiro ^{[3
]}

机构：

[1] Univ Fed Fluminense, UFF, Escola Engn, BR-24210240 Niteroi, RJ, Brazil

[2] Univ Fed Ceara UFC, Dept Engn Met & Mat, BR-60455760 Fortaleza, CE, Brazil

[3] Univ Fed Itajuba UNIFEI, Inst Ciencias Exatas, Itajuba, MG, Brazil

来源：

MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2012年 / 15卷 / 06期

关键词：

duplex stainless steel; heat treatment; tensile properties; work hardening exponent; STAINLESS-STEEL; LOW-TEMPERATURES; DEFORMATION; RESISTANCE;

D O I：

10.1590/S1516-14392012005000116

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Duplex stainless steels are high strength and corrosion resistant steels extensively used in the petrochemical and chemical industries. The aging at 475 degrees C for long periods of time provokes embrittlement and deterioration of corrosion resistance. However, short duration aging at 475 degrees C may be used as heat treatment to improve mechanical resistance with small decrease in the other properties. In this work the flow stress curves of lean duplex UNS S32304 and duplex UNS S32205 steels were modeled with Hollomon's equation and work hardening exponents (n) were determined. The analyses were conducted in specimens annealed and heat treated at 475 degrees C for short periods of time. The aging at 475 degrees C for 4 hours, 8 hours and 12 hours promoted significant hardening with small decrease of ductility. The work hardening exponents of both steels were compared, being higher in the duplex steel than in the lean duplex grade.

引用

页码：859 / 864

页数：6

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