·Paper Publications
Indexed by: Journal paper
Journal: 机械工程学报
Included Journals: EI
Discipline: Engineering
First-Level Discipline: Material Science and Engineering
Document Type: J
Key Words: 激光选区熔化;GH3536;热等静压;显微组织;拉伸性能;
Date of Publication: 2022-05-30
Impact Factor: 2.221
Abstract: 利用激光选区熔化(Selective laser melting, SLM)技术制备了GH3536镍基高温合金,研究了不同热等静压(Hot Isostatic Pressing, HIP)温度对SLM成形GH3536合金裂纹和组织性能的影响。利用XRD、SEM、EBSD、EPMA等方式表征了GH3536相组成和组织演变,利用高温持久性能试验机测试合金室温和高温拉伸性能。结果表明:经HIP后,SLM成形GH3536合金相组成保持不变,均为γ相,但晶格常数降低,且随着HIP温度的升高而降低。SLM态合金中存在10-100μm的微裂纹和气孔缺陷,微裂纹主要存在于熔池边界。经HIP后,合金中微裂纹完全消除,但仍存在少量孔洞。GH3536合金经高温高压处理后,晶粒尺寸增大,拉伸强度有所降低。其中SLM态试样室温抗拉强度和延伸率分别为871 MPa和26.2%,HIP处理后延伸率最高提升13.7%,强度降低13.0%。900℃下SLM态试样抗拉强度和延伸率分别为247MPa和5.7%,HIP处理后延伸率最高提升13.4%,强度降低10.1%。
Links to published journals: https://kns.cnki.net/kcms/detail/detail.aspx?dbcode=CAPJ&dbname=CAPJLAST&filename=JXXB2022052601W&uniplatform=NZKPT&v=fc1BITehNRA7I7wb6-pzel5eJaTlLr3JQq35_edq7syKAVL53v1VSCfOFJhWCdHK
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The role of roller rotation pattern in the spreading process of polymer/short-Fiber composite powder in selective laser sintering
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Effect of Cr, Mo, and V elements on the microstructure and thermal fatigue properties of the chromium hot-work steels processed by selective laser melting