Effect of Preheating Temperature on Microstructure and Mechanical Properties of Friction Stir Welded DMR249A HSLA Steel Joints

被引：0

作者：

Nathan, Seerangan Ragu ^{[1
]}

Balasubramanian, Visvalingam ^{[2
]}

Rao, Ardula Gourav ^{[3
]}

Sonar, Tushar ^{[4
]}

Ivanov, Mikhail ^{[4
]}

机构：

[1] Mohan Babu Univ, Erstwhile Sree Vidyanikethan Engn Coll, Micromachining Res Ctr MMRC, Sch Mech Engn,Dept Mech Engn, Tirupati 517102, Andhra Pradesh, India

[2] Annamalai Univ, Ctr Mat Joining & Res CEMAJOR, Dept Mfg Engn, Chidambaram 608002, Tamil Nadu, India

[3] Naval Mat Res Lab NMRL, Ambernath 421506, Maharashtra, India

[4] Natl Res Univ, South Ural State Univ, Inst Engn & Technol, Dept Welding Engn, Chelyabinsk 454080, Russia

来源：

METALLOGRAPHY MICROSTRUCTURE AND ANALYSIS | 2024年 / 13卷 / 01期

关键词：

DMR249A microalloyed steel; Lanthanated tungsten alloy tool; Friction stir welding; Preheating; Microstructure; Mechanical properties; METALLURGICAL CHARACTERISTICS; TOUGHNESS; TENSILE; SPEED; ZONE;

D O I：

10.1007/s13632-024-01044-7

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The purpose of this research is to examine the influence of temperature of preheating on mechanical performance and microstructure of FSW joints of DMR249A steel. The FSW joints were produced with no preheating and preheating at 100, 150, 200 and 250 degrees C respectively. Tensile properties and toughness of FSW joints were reduced when the temperature of preheating was raised from 100 to 250 degrees C. This is primarily related to an increased input of heat that results in inclusions of tungsten due to the wear of W99 tool and grain coarsening in stir zone (SZ) of FSW joints. The FSW joints produced with no preheating and preheating at 100 degrees C displayed greater tensile properties and toughness compared to the FSW joints produced with preheating at 150, 200 and 250 degrees C. This refers to the greater refinement of SZ microstructure of FSW joints which is made up of greater bainite regions and acicular ferrite.

引用

页码：68 / 85

页数：18

共 46 条

[1] Microstructure and mechanical properties of hard zone in friction stir welded X80 pipeline steel relative to different heat input [J].