Effect of Quench Delay on Low-Temperature Mechanical Properties of Aluminium Alloy AA2219 Hand Forgings

被引：2

作者：

Arumugam, M. ^{[1
]}

Narayanan, P. Ramesh ^{[2
]}

Muthupandi, V. ^{[3
]}

机构：

[1] ISRO, Liquid Prop Syst Ctr, Thiruvananthapuram 695547, Kerala, India

[2] ISRO, Vikram Sarabhai Space Ctr, Thiruvananthapuram 695022, Kerala, India

[3] NIT, Dept Met & Mat Engn, Tiruchirappalli 6200015, Tamil Nadu, India

来源：

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2019年 / 72卷 / 06期

关键词：

Aluminium alloy AA2219; Solution treatment; Quench delay; % Reduction in the area; Optical microstructure; SEM; Fractography;

D O I：

10.1007/s12666-019-01617-z

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In aerospace applications, the quench delay (QD) after solution treatment for the alloy AA2219 is to be restricted to 15s. However, extended QDs are also permitted if the job temperature is maintained above 480 degrees C. To understand the effect of QD on low-temperature mechanical properties, AA2219 forgings were water-quenched after solution treatment with QDs of 15, 30, 50, 100, 200 and 300s and their low-temperature tensile properties were evaluated. Metallurgical characterisation using both optical and electron microscopes was performed. The tensile test results indicate that the strength starts decreasing after 200s (corresponds to the temperature 505 degrees C), and the % reduction in the area of cross section is drastically reduced from 25 to 12%. This is a vital input in deciding on the acceptability of forgings having longer QD as AA2219 being a choice of material for cryogenic applications.

引用

页码：1475 / 1479

页数：5