Microstructure and fatigue properties of electron beam welds with beam oscillation for heavy section

来源 :2013年国际焊接结构疲劳断裂学术会议 | 被引量 : 0次 | 上传用户:knightxmu
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  With the development of the manufacturing technology,electron beam welding(EBW)is capable of producing titanium alloy large welded components in aero fields.The process of EBW with beam oscillation was investigated for TC4-DT alloy with 50 mm thickness.
其他文献
在试验所设计的焊接参数(焊速度恒为60 mm/min,搅拌头旋转速度分别为:400 r/min、600 r/min、800 r/min、1000 r/min、1200 r/min)下,对7050铝合金进行搅拌摩擦焊接(Friction Stir Welding,FSW)。之后借助MM-W1立式万能磨损试验机,采用销-盘式摩擦磨损方式,在室温干摩擦磨损及润滑摩擦磨损条件下,对比性地研究了7050铝合
电阻点焊技术广泛应用在现代机械制造中,如汽车、机车、地铁等车辆车身结构。经过多年的研究,点焊焊接接头疲劳强度和寿命预测方法的研究日趋成熟,由于点焊接头应力及疲劳分析的复杂性,目前仍然没有有效的解决手段。
采用基于断裂力学的Walker裂纹扩展公式代替Verity方法中的Paris公式,得到一种新的考虑了平均应力影响的等效结构应力Sg.焊接结构中存在着高值残余应力,平均应力对于焊接接头的疲劳寿命影响不显著,但对于非焊接缺口件,平均应力的影响是显著的.
Low cycle fatigue(LCF)tests at strain amplitude from ±0.3%to ±1.2%were performed to investigate fatigue life and fracture morphology of a 900 MPa grade high strength steel.
气孔和微裂纹是铝合金熔化焊接头的主要缺陷,严重威胁着高速列车车体结构的安全性与服役性能。国内外研究指出,铝合金材料内铸造气孔的分布及规律对构件的疲劳断裂机制有重要影响,但迄今未见关于高能束流铝合金焊接接头内氢气孔与疲劳断裂机制之间关系的研究。
Welding distortion generated during assembly process strongly affected the manufacturing accuracy and productivity.Therefore,prediction of welding distortion has become of critical importance.
This paper studied the effects of the temperature and prestrain on the tensile properties and fracture toughness of high-strength structural steel Q420.
A coupling calculation program for combined loadings and creep damage has been developed by using the finite element analysis codes ABAQUS and its sequential coupling function.
Fatigue properties of HG785 high strength steel with a medium plate thickness welded by both hybrid plasma arc welding(HPAW)process and regular GMAW process were investigated.Compare to regular GMAW p
Mechanical properties of HG785 high strength steel with a medium plate thickness welded by both hybrid plasma arc welding(HPAW)process and regular GMAW process were investigated.