Effects of high-intensity ultrasonic-wave emission on the weldability of aluminum alloy 7075-T6

被引：92

作者：

Dai, WL ^{[1
]}

机构：

[1] Feng Chia Univ, Dept Mech & Comp Aided Engn, Taichung 40724, Taiwan

来源：

MATERIALS LETTERS | 2003年 / 57卷 / 16-17期

关键词：

ultrasonic-wave emission; ultrasound-assisted technique; aluminum alloy 7075-t6; peak temperature; dwell time; cooling rate; crystal growth; hardness;

D O I：

10.1016/S0167-577X(02)01262-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work high-intensity ultrasonic wave is conducted into aluminum alloy 7075-T6 to observe the effect of emission waves on the weldability during inert gas tungsten arc (GTA) welding. Through the heat-affected zone (HAZ) and the weld, the ultrasonic-wave emissions with different paths are examined and directly correlated to I the heating time, dwell time, cooling rate, as well as peak temperature of the thermal cycle, and to the grain growth, weld penetration, and hardness of the weldment. In addition, a methodology based on the characteristic curves of the relative amplitude ratios of the reflected longitudinal wave and vertical shear wave for improving the weldability of aluminum alloy 7075-T6 is presented. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：2447 / 2454

页数：8

共 10 条

[1]

[Anonymous], 1976, WAVE PROPAGATION ELA

[2]

CHUNG BC, 1996, THESIS FENG CHIA U T

[3] ENERGY-TRANSFER AND BOND STRENGTH IN ULTRASONIC WELDING OF THERMOPLASTICS [J].

FRANKEL, EJ ;

WANG, KK .

POLYMER ENGINEERING AND SCIENCE, 1980, 20 (06) :396-401

[4]

Kino G. S., 1987, ACOUSTIC WAVES

[5]

Kou S., 1987, Welding Metallurgy

[6]

KUO S, 1985, METALL T A, V16, P203

[7]

LEVINA M, 2000, PHARM RES, V17

[8] GRAIN-REFINEMENT IN MAGNETICALLY STIRRED GTA WELDS OF ALUMINUM-ALLOYS [J].

PEARCE, BP ;

KERR, HW .

METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1981, 12 (03) :479-486

[9] EFFECT OF ARC VIBRATION AND CURRENT PULSES ON MICROSTRUCTURE AND MECHANICAL-PROPERTIES OF TIG TANTALUM WELDS [J].

SHARIR, Y ;

PELLEG, J ;

GRILL, A .

METALS TECHNOLOGY, 1978, 5 (JUN) :190-196

[10]

SHIEH MZ, 2001, THESIS FENG CHIA U T

← 1 →