喷射成形镍基高温合金时效行为(英文)
发布时间:2018-12-26 09:39
【摘要】:主要研究了喷射成形镍基高温合金的微观组织特征和时效硬化行为。合金经1140℃,8 h固溶处理,然后在780℃,2~12 h时效处理。分别测试了合金显微硬度、析出相大小及形态、电导率和正电子湮没寿命与时效时间的关系。结果表明,在时效8 h时,显微硬度达到最大值,此时γ'长大到临界尺寸56 nm。然而,时效时间超过8 h,合金显微硬度降低,这是由于γ'长大超过了其临界尺寸。随着时效时间延长至6 h,电导率快速增加到其最大值32%IACS,但是正电子湮没寿命则降低到最小值149 ps,在时效时间为10 h时,正电子湮没寿命达到最大值297 ps。这是由在时效过程中γ'尺寸的变化以及缺陷浓度的变化引起的。
[Abstract]:The microstructure and aging hardening behavior of spray-formed nickel-based superalloy were studied. The alloy was treated at 1140 鈩,
本文编号:2391903
[Abstract]:The microstructure and aging hardening behavior of spray-formed nickel-based superalloy were studied. The alloy was treated at 1140 鈩,
本文编号:2391903
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