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文章对比研究了置氢和除氢TC21合金的组织和力学性能。结果表明,随着TC21合金中氢含量的增加,α相的含量减少,而β相含量增加,氢化合金的抗压强度下降,但极限压缩率增加。相比未氢化的TC21合金,含有适当氢含量(0.6wt%~0.9wt%)的合金在塑性变形过程中表现出更高的塑性(最大增加了30.3%)以及更低的流动应力(下降了150MPa~200MPa),这将有利于改善TC21合金的冷塑性成形。除氢后,TC21合金组织细化明显,讨论了初生α相和β转变组织的细化机理。除氢后,TC21合金的抗压强度和显微硬度增加,而极限压缩率下降。当0.6wt%~0.8wt%的氢被临时引进并排出后,合金的抗压强度增加了4.5%(约65MPa)。临时引入并排出0.8wt%的氢后,显微硬度从331HV提高至373HV。
The article compares the microstructure and mechanical properties of TC21 alloy with hydrogen and hydrogen removal. The results show that with the increase of hydrogen content in TC21 alloy, the content of α phase decreases, while the content of β phase increases, the compressive strength of hydrogenated alloy decreases, but the ultimate compressibility increases. The alloys containing the appropriate hydrogen content (0.6 wt% ~ 0.9 wt%) showed higher plasticity (maximum increase of 30.3%) and lower flow stress (decreased) during plastic deformation compared to the unhydrogenated TC21 alloy 150MPa ~ 200MPa), which will help to improve the TC21 alloy cold plastic forming. In addition to hydrogen, TC21 alloy refinement significantly, discussed the primary α-phase and β transformation of the thinning mechanism. In addition to hydrogen, TC21 alloy compressive strength and microhardness increased, and the ultimate compression rate decreased. When 0.6wt% ~ 0.8wt% of hydrogen was temporarily introduced and discharged, the compressive strength of the alloy increased by 4.5% (about 65MPa). After temporarily introducing and discharging 0.8 wt% of hydrogen, the microhardness increases from 331 HV to 373 HV.