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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Cost-Effective Techniques for Weld Property Measurement and Technologies for Improving Weld HE and IGSCC Resistance for Alternative Fuel Pipelines</title>
      <link>https://rip.trb.org/View/1261699</link>
      <description><![CDATA[Built upon proven technologies, this proposal research aims at (i) advancing the general knowledge related to fatigue and fracture properties of pipeline steel welds subject to high pressure hydrogen atmosphere and (ii) developing technologies for weld property improvement. In particular, the project objectives are as follows: (1)  Apply Multiple-Notch Tensile and Spiral Notch Torsion Tests for measuring the local tensile strength and fracture toughness of weld region in high-pressure hydrogen. (2) Develop a cost-effective low-frequency cyclic fatigue testing technique for measuring the weld fatigue property in high-pressure hydrogen. (3) Develop the technical basis and database of hydrogen-induced degradation of weld mechanical properties as a function of pressure, temperature and microstructure. (4) Evaluate technologies for improving the HE and IGSCC resistance of steel welds.  The technologies include (a) tailoring residual stress by overlay welds, (b) new welding consumables, and (c) friction stir welding.]]></description>
      <pubDate>Tue, 10 Sep 2013 01:01:02 GMT</pubDate>
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