Results 81 to 90 of about 5,176,577 (228)

Insights Into Paint‐Bake Toughening of Resistance Spot Welds of a 2.0 GPa Warm‐Stamped Medium‐Mn Steel

steel research international, EarlyView.
Paint baking of resistance spot welded joints of 2.0 GPa warm‐stamped medium‐Mn steel activates low‐temperature tempering, forming fine cementite in the fusion zone and enhancing toughness. Crack propagation resistance increases, shifting the failure mode from partial interfacial to complete pullout, with peak load and energy absorption rising ...
Sunusi Marwana Manladan, Savyasachi Nellikode, YeoJin Jang, Sumin Lee, Dileep Chandran Ramachandran, Sung‐bo Heo, Jinyoung Lee, Young‐Kook Lee, Yeong‐Do Park   +8 more
wiley   +1 more source

YOLOv8n-RSDD: A High-Performance Low-Complexity Rail Surface Defect Detection Network

IEEE Access
Detecting surface defects on railway tracks is of significant importance for reducing the risk of safety incidents in high-speed railways. In response to the challenges in the field of railway track surface defect detection, such as insufficient ...
Zhanao Fang, Liming Li, Lele Peng, Shubin Zheng, Qianwen Zhong, Ting Zhu   +5 more
doaj   +1 more source

Crash Behavior of DP800–DP1000 Advanced High‐Strength Steel’s Dissimilar Resistance Spot Welded Joints Under Quasi‐static and High Strain Rates

steel research international, EarlyView.
The high‐strain‐rate behavior of resistance spot‐welded DP800–DP1000 joints is investigated. Results show that microstructural gradients across BM–HAZ–FZ govern hardness, strain rate sensitivity, and failure modes. While strength increases with strain rate, energy absorption is controlled by ductility, with DP800–DP800 joints showing superior ...
Pankaj Shrivastava, Velaphi Msomi
wiley   +1 more source

Strain‐Induced NbC Precipitation as a Governing Mechanism for Hot Deformation Resistance in CrNiMnMoB Ultrahigh‐Strength Steels

steel research international, EarlyView.
Strain‐induced NbC precipitation governs hot‐deformation resistance in CrNiMnMoB ultrahigh‐strength steel by suppressing dynamic recrystallization, increasing activation energy, and refining martensitic substructures. The precipitation response is controlled by temperature, supersaturation, and strain rate, with slow deformation promoting extensive NbC
Atef Hamada, Ali Khosravifard, Khaled Elanany, Ahmed W. Abdelghany, Jukka Kömi, Pasi Suikkanen, Mohammed Ali   +6 more
wiley   +1 more source

Railway Wheel Flat and Rail Surface Defect Detection by Time-Frequency Analysis

Chemical Engineering Transactions, 2013
Damage to the surface of railway wheels and rails commonly occurs in most railways and, if not detected at an early stage, can result in rapid deterioration and possible failure incurring high maintenance costs.
B. Liang, S. Iwnicki, G. Feng, A. Ball, V.T. Tran, R. Cattley   +5 more
doaj   +1 more source

Multi‐level fatigue reliability assessment of reinforced concrete railway bridges

Structural Concrete, EarlyView.
Abstract This paper presents a multi‐level reliability framework for assessing the fatigue life of reinforced concrete (RC) railway trough bridges subjected to cyclic loading. The framework incorporates increasing levels of analytical complexity and real‐world data in four steps. First, an analytical model applies S–N curves and the Palmgren–Miner rule
Silvia Sarmiento, Jaime Gonzalez‐Libreros, Chao Wang, Lennart Elfgren, Ola Enoksson, Tommy Höjsten, Lars‐Olof Andersson, Gabriel Sas   +7 more
wiley   +1 more source

Rail Profile Matching Assessment and Selection for Sharp Radius Curves in Urban Metro: A Case Study

Urban Rail Transit
Urban rail transit systems contain numerous sharp radius curves where rail fatigue defect occurs frequently. In severe cases, this leads to extensive rail scaling, rail surface fatigue cracks, and intensified wheel-rail vibration and noise.
Bolun An, Wei Lu, Fengshou Liu, Hao Liu, Yang Xu, Sen Wang   +5 more
doaj   +1 more source

Development of new rail repair profiles for different operating conditions

Вестник Научно-исследовательского института железнодорожного транспорта
Introduction. Currently, contact-fatigue defects prevail on rails with increased intensity of lateral and vertical rail wear. The authors consider it essential to develop rational repair profiles for sections with different track plan, as current repair ...
O. A. Suslow, I. V. Khromov
doaj   +1 more source

Vision language models for bridge inspections: A review of applications in image‐based damage documentation

Structural Concrete, EarlyView.
Abstract Automating bridge inspections requires more than detecting individual damage instances. It demands systems capable of describing, contextualizing, and interpreting damage in an inspection‐relevant manner. Conventional computer vision approaches, such as object detection and segmentation, primarily address visual recognition tasks and are ...
Rona Firdes Çelik, Ulas Bagci, Sylvia Kessler   +2 more
wiley   +1 more source

Automatic Identification and Early-warning System for On-board Rail Corrugation Based on Image Processing Technology

Chengshi guidao jiaotong yanjiu
[Objective] Current daily metro track inspections, including manual detection and track inspection vehicle method, suffer from issues such as low efficiency and high costs, failing to meet the increasing demands for rail transit operation safety ...
Tingrui CUI, Yujie LI, Chang LIU, Miaomiao HUO   +3 more
doaj   +1 more source