AA2050-T852和AA7050-T7452合金锻件不同方位疲劳寿命的比较

IF 1.5 4区材料科学 Q3 ENGINEERING, MECHANICAL

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2023-04-03 DOI:10.1115/1.4062257

Ngoc Fuhr, S. Zhou, Keren Shen, Aseel Rajab, Salim Es-Said, Thaung Shonnu, Skyler Tan, Ryan Riebe, Nathan Santos, Ye Thura Hein, R. Toal, Yong Jun Li, M. Timko, O. Es-Said

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引用次数: 0

摘要

本研究比较了飞机结构中常用的AA2050-T852合金和AA7050-T7452合金的疲劳性能。对不同取向、不同厚度的锻造板上切割的AA2050-T852和AA7050-T7452试样进行了旋转梁疲劳试验。样品分别在345 MPa (50 ksi)、276 MPa (40 ksi)、207 MPa (30 ksi)和172 MPa (25 ksi)下进行了测试。所有样品的扫描电镜(SEM)图像均为混合模式。而AA2050-T852合金的等轴韧窝更丰富、更细小。结果表明:在几乎所有应力下，AA2050-T852合金的疲劳寿命性能均优于AA7050-T7452合金。两种合金的疲劳各向异性无显著差异。

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Comparison of Fatigue Life of AA2050-T852 and AA7050-T7452 Alloy Forgings at Different Orientations

This study compares the fatigue performance between the AA2050-T852 alloy and AA7050-T7452 alloy traditionally used in aircraft structures. Rotating beam fatigue tests were performed on AA2050-T852 and AA7050-T7452 specimens cut from forged plates with different orientations and at different thickness levels. The samples were tested at 345 MPa (50 ksi), 276 MPa (40 ksi), 207 MPa (30 ksi) and 172 MPa (25 ksi). Scanning Electron Microscope (SEM) images showed mixed mode in all samples. However, the equiaxed dimples were more abundant and finer in the AA2050-T852 alloy. The results indicated that AA2050-T852 alloy demonstrated better fatigue life performance compared to AA7050-T7452 alloy at almost all stresses. No significant difference in fatigue anisotropy was found in one alloy versus the other.

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来源期刊

Journal of Engineering Materials and Technology-transactions of The Asme 工程技术-材料科学：综合

CiteScore

3.00

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships