Effect of Testing Variables on the Hydrogen Embrittlement of Titanium and a Ti-8 pct Mn Alloy |
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Authors: | R I Jaffee G A Lenning C M Craighead |
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Affiliation: | 1.Nonferrous Physical Metallurgy Division,Battel le Memorial Institute,USA;2.Titanium Metals Corp. of America,Henderson,USA |
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Abstract: | The effects of increasing hydrogen content, introducing a notch, and changing the strain rate on properties of titanium and one of its alloys were investigated over a range of testing temperatures from —196° to 200°C. Both high purity and commercial purity A-55 titanium were used as representative a materials, while a commercial Ti-8 pct Mn alloy was used for an α-β alloy. It was found possible to analyze the data, using the ductile-to-brittle transition temperature concept. Increasing hydrogen, the presence of a notch, and increasing the testing speed raised the transition temperature for the a materials. The presence of hydrogen and notches raised the transition temperature of the α-β alloy also. However, increasing the testing speed generally decreased the transition temperature of the α-β alloy. |
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