Method for measuring hydrogen in aluminum by vacuum fusion extraction

Abstract

The characteristics of crucibles made of graphite, mullite, alumina, and stainless steel (SUS 27) were examined for the purpose of retaining a molten aluminum sample in the extraction tube of gas measuring apparatus. The gas volume extracted by these crucibles or blank gas volume was measured, and hydrogen contents of aluminum samples were also measured from vacuum fusion extraction method by using these crucibles.The results showed that a crucible made of SUS 27 was more excellent in characteristics than those of other ones. Then, the following tests were conducted by using the SUS 27 crucible.(1) Reliability of measured values of hydrogen in aluminum obtained by vacuum fusion extraction method.(2) Distribution of hydrogen in the aluminum castings poured into the Ransley's chill mold.

Influences of hydrogen on deformation and fracture behaviors of high Zn 7XXX aluminum alloys

“…The vacuum fusion method was utilized to measure the total hydrogen content of each material. The description of vacuum fusion method for analyzing the total hydrogen content in aluminum alloys is reported elsewhere (Imabayashi and Tomita 2014).…”

Assessment of hydrogen embrittlement via image-based techniques in Al–Zn–Mg–Cu aluminum alloys

“…The vacuum fusion method was used to measure the total hydrogen content of specimens after EDM cutting [15], and the content of precharged hydrogen was 6.97 mass ppm for the high hydrogen content specimen and 3.26 mass ppm for the low hydrogen content specimen, respectively. Details of the vacuum fusion method used for analyzing the total hydrogen content in aluminum are shown elsewhere [27].…”