METASTABLE PRECIPITATE IN A DUPLEX MARTENSITE PLUS FERRITE PRECIPITATION-HARDENING STAINLESS-STEEL

被引：11

作者：

AYER, R ^{[1
]}

BENDEL, LP ^{[1
]}

ZACKAY, VF ^{[1
]}

机构：

[1] ETHICON INC,SOMERVILLE,NJ 08876

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1992年 / 23卷 / 09期

关键词：

D O I：

10.1007/BF02658048

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystal structure and chemical composition of the strengthening precipitates in an Fe-11.8 pct Cr-8.5 pct Ni-1.8 pct Ti-3.8 pct Mo martensite + ferrite duplex steel were determined by transmission electron microscopy (TEM). The study revealed that a metastable precipitate phase formed in the ferrite and martensite phases during the initial stages of aging. The metastable phase was proposed to have a hexagonal crystal structure similar to that reported for the omega phase in Ti alloys. Prolonged aging formed an equilibrium orthorhombic precipitate phase with a Ni3(MO, Ti) stoichiometry. The higher dislocation density in martensite accelerated the precipitation reaction, and the transition to the equilibrium precipitate occurred with shorter aging times compared to ferrite. The details of the electron diffraction and analytical electron microscopy studies of the precipitates are described.

引用

页码：2447 / 2453

页数：7

共 12 条

[1]

AVER R, 1991, ELECTRON MICROSCOPY

[2]

BENDEL LP, 1991, Patent No. 5000912

[3]

CHILTON JM, 1964, T Q ASM, V69, P528

[4]

DECKER RF, 1988, MET PROGR, V6, P45

[5] THE MEASUREMENT AND CALCULATION OF THE X-RAY SPATIAL-RESOLUTION OBTAINED IN THE ANALYTICAL ELECTRON-MICROSCOPE [J].

MICHAEL, JR ;

WILLIAMS, DB ;

KLEIN, CF ;

AYER, R .

JOURNAL OF MICROSCOPY-OXFORD, 1990, 160 :41-53

[6]

Narayanan G. H., 1971, Metallography, V4, P343, DOI 10.1016/0026-0800(71)90063-2

[7]

REISDORF BG, 1963, T AM SOC MET, V56, P783

[8] STRUCTURE AND DECOMPOSITION OF ZR AND TI BCC SOLID-SOLUTIONS [J].

SASS, SL .

JOURNAL OF THE LESS-COMMON METALS, 1972, 28 (01) :157-+

[9] PRECIPITATION REACTIONS AND STRENGTHENING BEHAVIOR IN 18 WT PCT NICKEL MARAGING STEELS [J].

VASUDEVAN, VK ;

KIM, SJ ;

WAYMAN, CM .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1990, 21 (10) :2655-2668

[10]

Villars P., 1985, PEARSONS HDB CRYSTAL

← 1 2 →