Generic hollow pump bodies made from aluminium alloy 2014A forgings have been solution heat treated and quenched into either cold water or polyalkylene glycol (PAG) solutions. An industry standard PAG type synthetic quenchant was evaluated, and the influence of two concentrations of the PAG solution on residual stress in the pump bodies was characterised, using neutron and X-ray diffraction. These residual stresses were then compared to those resulting after a pump in the as quenched condition was subject to a widely known but controversial commercial vibratory stress relieving procedure. The use of neutron diffraction allowed the through thickness residual stresses to be evaluated in the pumps. Results demonstrate that PAG quenching is highly effective at significantly reducing residual stress when compared to cold water quenching, but the impact is non uniform and cannot be simply quantified. In this investigation, we prove the effect of vibratory stress relief is negligible, and much less than that achieved by PAG quenching.

由铝合金2014A锻件制成的通用空心泵体经过固溶热处理，然后淬冷到冷水或聚亚烷基二醇（PAG）溶液中。对工业标准的PAG型合成淬火剂进行了评估，并使用中子和X射线衍射表征了两种浓度的PAG溶液对泵体中残余应力的影响。然后将这些残余应力与在如此急冷条件下的泵经过众所周知但有争议的商业振动应力消除程序后所产生的残余应力进行比较。中子衍射的使用允许在泵中评估贯穿厚度的残余应力。结果表明，与冷水淬火相比，PAG淬火在降低残余应力方面非常有效，但是影响是不统一的，不能简单地量化。在这项研究中，我们证明了振动应力消除的影响可以忽略不计，并且远小于通过PAG淬火实现的效果。