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近日，材料科学与工程学院武传松教授团队在铝合金搅拌摩擦焊接（FSW）动态再结晶机制和接头微观组织演变方面取得新进展。相关研究成果以“Analysis and characterization of dynamic recrystallization and grain structure evolution in friction stir welding of aluminum plates”为...
利用光学显微镜(OM)、扫描电子显微镜(SEM)、电子背散射衍射(EBSD)、硬度和室温拉伸等方法，研究焊接工艺对厚度为5 mm的6082-T6铝合金搅拌摩擦焊接头微观组织与力学性能的影响。研究结果表明：在相同焊接速度下，随着搅拌针旋转速度的增加，焊核区(NZ)晶粒长大，再结晶程度提高，第二相数量增多且分布更均匀，焊核区的硬度增加；而热影响区(HAZ)晶粒长大、第二相粗化，硬度严重下降。低旋转速度...
日前，中国医学科学院皮肤病研究所王宝玺教授领导的课题组经过2年研究，报告了重大专项课题“防治性病对预防艾滋病的作用研究”结果，干预组FSW人群的梅毒发病密度比对照组降低了70%，尤其是针对文化程度低、外地户籍、安全套使用率低的低档FSW群体，控制效果更为显著。该论文于2012年7月17日在The Journal of Infectious Diseases发表。
铝合金FSW过程中搅拌针前缘金属周期性流动行为研究
搅拌摩擦焊 金属流动 周期性 接头组织形貌
2013/9/29
利用高速摄像技术研究了搅拌摩擦焊过程中不同工艺参数条件下搅拌工具与被焊材料之间的相对运动，并结合焊核区金属组织形貌对搅拌针前缘金属流动行为进行分析。结果表明在搅拌摩擦焊接过程中搅拌工具与被焊接板材之间的相对运动存在着明显的周期性现象。并且搅拌针对其前缘金属作用的一个周期可分为两个阶段即平台阶段和进给阶段。在进给阶段前缘金属流动方式主要以整体流动的方式进行。
Microstructure and properties of FSW joints of 2017A/6013 aluminium alloys sheets
Friction Stir Welding Aluminium alloy 2017A Aluminium alloy 6013
2009/12/2
Purpose: The aim of the studies was to analyse the structure and mechanical properties of FSW joints. Experiment were perform in order to study possibilities to join different aluminium alloys 2017A a...
FSW characterization of 6082 aluminium alloys sheets
Friction Stir Welding 6082 aluminium alloy Hardness Microstructure
2010/8/16
Friction stir welding (FSW) technology help joining aluminium sheets, without material preheating. The welding process takes place by a rotating FSW tool. The tool works within welded materials moving...
Purpose: of this paper is to analyze the results of tests on the mechanical properties and microstructural changes
in Friction Stir Welds in the aluminium alloy 6082-T6 in function of varying process...
Hyperbaric arthralgia during helium-oxygen dives from 100 to 850 fsw
human heliox Cartilage arthralgia Dehydration joint
2009/7/20
Hyperbaric arthralgia during helium-oxygen dives from 100 to 850 fsw.
Assessment of vertical excursions and open-sea psychological performance at depths to 250 fsw
decompression nitrogen narcosis
2009/7/20
A series of 10 two-man descending vertical excursion dives was carried out in the open sea from an ocean-floor habitat off the coast of Puerto Rico by four aquanauts saturated on a normoxic-nitrogen b...
Joint crepitation after chamber air dives to 188 fsw. Undersea Biomed. Res. 4(1):89-94.-Joint crepitation was observed in all subjects (8) who were decompressed from 188 fsw (gauge) dry chamber air di...
Sleep, mood, and fatigue during a 14-day He-O2 open-sea saturation dive to 850 fsw with excursions to 950 fsw
human saturation dive fatigue sleep mood
2009/7/17
To obtain information on sleep, mood, and performance of divers and surface support personnel during deep dives in the open sea, 12 divers and 12 surface support personnel were monitored during a 14-d...
Urinary excretion of water and electrolytes during open-sea saturation diving to 850 fsw
human Urinary excretion electrolyte diuretic
2009/7/17
The dive was carried out in the open sea to a depth of 850 fsw (26.7 ATA) for 6 days (DD 1--6) in the saturated mode, with personnel transfer capsule (PTC) excursions between 0 and 150 fsw and diver e...
Prolonged oxygen exposures in immersed exercising divers at 25 fsw (1.76 ATA)
oxygen carbon dioxide human toxicity immersion human
2009/7/17
Twenty-four oxygen exposures lasting 80 to 271 min were performed by six immersed exercising subjects at 25 fsw (1.76 ATA) in both warm and cold water. Two types of exercise were performed, moderate w...
A deep stop during decompression from 82 fsw (25 m) significantly reduces bubbles and fast tissue gas tensions
Atmospheric Pressure Decompression Diving Humans
2009/6/4
In spite of many modifications to decompression algorithms, the incidence of decompression sickness (DCS) in scuba divers has changed very little. The success of stage, compared to linear ascents, is ...
Effect of varying deep stop times and shallow stop times on precordial bubbles after dives to 25 msw (82 fsw)
Decompression DECOMPRESSION SICKNESS deep stops DOPPLER Humans
2009/6/2
In our previous research, a deep 5-min stop at 15 msw (50 fsw), in addition to the typical 3-5 min shallow stop, significantly reduced precordial Doppler detectable bubbles (PDDB) and "fast" tissue co...