HYDROGEN TRAPPING EFFECT OF SUBSTITUTIONAL ALLOYING ELEMENTS IN α-Fe
QIAN Lihe;CAO Mingzhou;WAN Xiaojing Institute of Metal Research; Academia Sinica; Shenyang
Cite this article:
QIAN Lihe;CAO Mingzhou;WAN Xiaojing Institute of Metal Research; Academia Sinica; Shenyang. HYDROGEN TRAPPING EFFECT OF SUBSTITUTIONAL ALLOYING ELEMENTS IN α-Fe. Acta Metall Sin, 1991, 27(1): 27-31.
Abstract The effect of Cr, Mn, Co, Ni, Si or Mo on the diffusivity of hydro-gen in α-Fe has been studied near room temperature by means of sensitive electro-chemical method. With the of increases concentration of alloying elements, the hydro-gen diffusivity in binary Fe alloys decreases and the activation energy increases. Onthe basis of Oriani's approach, the trapping parameters of the alloying elements inthe Fe alloys are calculated and the trap binding energy between the above elementsand hydrogen are obtained. The increasing sequence of trap binding energy is asfollows: Si, Co, Ni, Mn, Cr, Mo. Finally, the nature of the trap binding energy isanalyzed according to both the interaction between lattice strain field induced byalloying elements and hydrogen elasticity as well as the interaction between alloy-ing elements and hydrogen electricity.
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TENG Qinghai; CHEN Lian; LIU Di;; KE Wei(Institute of Corrosion and Protection of Metal; The Chinese Academy of Sciences; State Key Laboratory forCorrosion and Protection; Shenyang 110015)( Institute of Metal Research; The Chinese Academy of Sciences; Liaoning Key Laboratory for Material andHydrogen; Shenyang 110015)( Institute of Equipmeat;Research Fushun Petrochemical Company; Fushun )(Correspondednt : MENC Qinghai; Tel: (0413)B434819; Tel. (0413)2425835. MICROSTRUCTURE,DIFFUSION ACCUMULATION OF HYDROGEN AND CRACKING BEHAVIOR IN THE INTERFACE BETWEEN CLADDING AND BASE METALL[J]. 金属学报, 1998, 34(6): 633-639.
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LI Meishuan; PENG Hiao;MA Hinqing;LI Tiefan(Corrosion Science Laboratory;Institute of Corrosion and Protection of Metals;Chinese Academy of Sciences)(Manuscript received 10 May;1993). INFLUENCE OF Ce IMPLANTATION ON OXIDATION BEHAVIOUR OF Ni20Cr ALLOY[J]. 金属学报, 1994, 30(16): 169-174.
YANG Ke Insittute of Metal rescarch;Academia Sinica;Shenyang;XIAN Aiping;CAO Mingzhou;WAN Xiaojing Institute of Metal Research; Academia Sinica; Shenyang. AN IMPROVED METHOD FOR CALCULATING DIFFUSIVITY OF HYDROGEN[J]. 金属学报, 1988, 24(2): 218-220.
