Influences of Welding Techniques on Fatigue Behaviors of Thick-Walled Cylinders of 30CrMnSiNi2A Steel

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2025-02-11 DOI:10.1111/ffe.14583

Jian Long, Lin-Jie Zhang, Miao-Xia Xie, Suck Joo Na

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Abstract

30CrMnSiNi2A steel has been widely used to manufacture airplane structural parts. The fatigue behaviors of weld metals (WMs) of electron beam welding (EBW) joints and shielded metal arc welding (SMAW) joints (hereinafter shorted as EBW-WM and SMAW-WM, respectively) of 26-mm-thick 30CrMnSiNi2A ultrahigh-strength steel were compared. The fatigue behavior of the EBW-WM is obviously superior to that of the SMAW-WM. Microstructures and microdefects are important causes for the great difference between WMs of the two types of joints in term of the fatigue behaviors. Microstructures in the EBW-WM are similar to those in the BM, both containing a large amount of lath martensite. However, martensite is not found in the SMAW-WM; instead, blocky ferrite and nonmetallic inclusions are present in the SMAW-WM. The research findings provide data support for the updating and upgrading of welding techniques of 30CrMnSiNi2A thick-walled cylinders.

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焊接工艺对30CrMnSiNi2A钢厚壁圆筒疲劳行为的影响

30CrMnSiNi2A钢已广泛用于制造飞机结构件。比较了26 mm厚30CrMnSiNi2A超高强度钢电子束焊接（EBW）接头和保护金属电弧焊（SMAW）接头（以下分别简称EBW- wm和SMAW- wm）焊缝金属的疲劳行为。EBW-WM的疲劳性能明显优于SMAW-WM。微观组织和微缺陷是造成两类接头焊缝疲劳性能差异较大的重要原因。EBW-WM的显微组织与BM相似，均含有大量板条马氏体。然而，在SMAW-WM中没有发现马氏体；相反，在SMAW-WM中存在块状铁氧体和非金属夹杂物。研究结果为30CrMnSiNi2A厚壁圆筒焊接工艺的更新升级提供了数据支持。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.