Effects of austenite reversion during overageing on the mechanical properties of 18 Ni (350) maraging steel

被引：149

作者：

Viswanathan, UK ^{[1
]}

Dey, GK

Sethumadhavan, V

机构：

[1] Bhabha Atom Res Ctr, Post Irradiat Examinat Div, Bombay 400085, Maharashtra, India

[2] Bhabha Atom Res Ctr, Div Sci Mat, Bombay 400085, Maharashtra, India

[3] Bhabha Atom Res Ctr, Alloy Fuels Sect, Bombay 400085, Maharashtra, India

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 398卷 / 1-2期

关键词：

maraging steel; martensite; reverted austenite; intermetallic precipitates; overageing; prior-austenite grain boundary; toughness;

D O I：

10.1016/j.msea.2005.03.074

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The sequence of austenite reversion during overageing in 18 Ni (350) maraging steel was examined and its effects on the mechanical properties were evaluated. Austenite with different morphological features were identified at different stages of overageing. The reverted austenite caused decrease in the yield strength (YS) and ultimate tensile strength (UTS) and increase in the tensile ductility. Though the presence of austenite appeared to be beneficial to impact toughness in the initial stages of overageing, severe embrittlement was noticed in samples subjected to prolonged ageing. The observed deterioration in toughness with continued overageing was associated with the coarsening of intermetallic precipitates formed during the early stages of ageing. Electron probe micro analysis (EPMA) carried out on fracture surface identified the embrittling species as precipitates rich in titanium and nickel. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：367 / 372

页数：6

共 15 条

[1] INVESTIGATION OF PLASTIC FRACTURE OF ALSL-4340 AND 18 NICKEL-200 GRAE MARAGING STEELS [J].

COX, TB ;

LOW, JR .

METALLURGICAL TRANSACTIONS, 1974, 5 (06) :1457-1470

[2]

Cullity B.D., 1976, ELEMENTS XRAY DIFFRA

[3]

DECKER RF, 1988, ADV MAT PROCESS INT, V6, P45

[4]

Floreen S., 1968, METALL REV, V13, P115, DOI [10.1179/imr.1968.13.1.115, DOI 10.1179/MTLR.1968.13.1.115]

[5] Quantification of phase transformation kinetics of 18 wt.% NiC250 maraging steel [J].

Guo, Z ;

Sha, W ;

Li, D .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 373 (1-2) :10-20

[6] REVERTED AUSTENITE DURING AGING IN 18NI(350) MARAGING-STEEL [J].

LI, XD ;

YIN, ZD .

MATERIALS LETTERS, 1995, 24 (04) :239-242

[7]

PAMPILLO CA, 1972, METALL T A, V31, P2895

[8]

Peters DT, 1979, SOURCE BOOK MARAGING, P304

[9] STRENGTH AND FRACTURE TOUGHNESS OF 18 NI (350) MARAGING STEEL [J].

RACK, HJ ;

KALISH, D .

METALLURGICAL TRANSACTIONS, 1971, 2 (11) :3011-&

[10] Microstructural changes during welding and subsequent heat treatment of 18Ni (250-grade) maraging steel [J].

Shamantha, CR ;

Narayanan, R ;

Iyer, KJL ;

Radhakrishnan, VM ;

Seshadri, SK ;

Sundararajan, S ;

Sundaresan, S .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2000, 287 (01) :43-51

← 1 2 →