A dataset of effect of long-term thermal exposure on microstructure of laser welded UNS N10003 alloy

Data DescriptionThe dataset associated with this study provides detailed information on the microstructure evolution and tensile rupture mechanism of laser-welded UNS N10003 alloy under long-term thermal exposure at 700°C. The data generation procedures included the preparation of UNS N10003 alloy plates, laser welding using an IPG YLS-10000 fiber laser, and subsequent thermal exposure in a furnace for varying durations up to 10,000 hours. Microstructural analyses were conducted using optical microscopy (OM), scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM).Data Generation Procedures:Materials and Preparation: UNS N10003 alloy plates were sectioned into smaller plates (300 mm × 100 mm × 4 mm) and underwent surface preparation via sandblasting and acetone cleaning.Welding Process: Laser welding was performed with parameters optimized based on radiographic testing. The laser beam was focused to a 0.26 μm diameter spot and guided by a KUKA robot.Thermal Exposure: Specimens were exposed at 700°C for various time intervals up to 10,000 hours and subsequently air-cooled.Data Processing Methods:Microstructural Analysis: Cross-sections of welded joints were mounted, ground, and polished for OM, SEM, and EBSD observations. TEM specimens were prepared and analyzed to identify precipitate structures.Tensile Testing: Tensile properties of the welded joints were tested at 700°C using a Zwick/Roell Z100 universal material machine.Temporal and Geographical Scopes:The dataset spans thermal exposure durations from immediate post-welding up to 10,000 hours.The research was conducted at the Shanghai Institute of Applied Physics, Chinese Academy of Sciences, and the Nuclear and Radiation Safety Center, China.Data Characteristics:

数据描述
本研究相关数据集提供了700℃长期热暴露下激光焊接UNS N10003合金（UNS N10003 Alloy）的微观结构演化及拉伸断裂机制的详细信息。数据生成流程包括UNS N10003合金板的制备、采用IPG YLS-10000光纤激光器（IPG YLS-10000 Fiber Laser）的激光焊接，以及随后在炉中进行的最长达10000小时的不同时长热暴露。微观结构分析采用光学显微镜（Optical Microscopy，OM）、扫描电子显微镜（Scanning Electron Microscopy，SEM）、电子背散射衍射（Electron Backscatter Diffraction，EBSD）和透射电子显微镜（Transmission Electron Microscopy，TEM）进行。

数据生成流程：
材料与制备：将UNS N10003合金板切割为较小的板材（300 mm × 100 mm × 4 mm），并通过喷砂处理（Sandblasting）和丙酮清洗（Acetone Cleaning）进行表面制备。
焊接工艺：基于射线检测（Radiographic Testing）优化参数后进行激光焊接，激光束聚焦至直径0.26 μm的光斑，并由库卡机器人（KUKA Robot）引导。
热暴露：试样在700℃下暴露不同时长（最长达10000小时），随后进行空冷处理。

数据处理方法：
微观结构分析：将焊接接头横截面进行镶嵌、研磨和抛光，以用于OM、SEM和EBSD观察；制备TEM试样并分析，以识别析出相结构（Precipitate Structures）。
拉伸测试：采用ZWICK/ROELL Z100万能材料试验机（ZWICK/ROELL Z100 Universal Material Machine）在700℃下测试焊接接头的拉伸性能。

时间与地理范围：
数据集涵盖从焊接后即刻至10000小时的热暴露时长范围。
研究在中国科学院上海应用物理研究所（Shanghai Institute of Applied Physics, Chinese Academy of Sciences）和中国核与辐射安全中心（Nuclear and Radiation Safety Center, China）开展。