CuCrZr parts were fabricated by laser beam powder bed fusion (LB-PBF) technique and subjected to different heat treatments. As a result, four different conditions were considered for further investigations, that is, the as-built condition, conditions of maximum hardness (MH) and maximum electrical conductivity (MC), and a condition representing a compromise between hardness and conductivity (H&C). Microstructural evolution and performance under monotonic and cyclic loading were studied. Fracture surfaces revealed significant volume fractions of process-induced defects such as lack-of-fusion (LoF) and pores, irrespective of the condition considered. The effect of these defects on the tensile behavior was found to be marginal, whereas the fatigue performance was noticeably affected due to multiple crack nucleation promoted by large LoF defects. Assessment by computed tomography (CT) revealed a strong influence of the geometry and therefore, of the scan path length, on resulting microstructure and defect population eventually rationalizing obvious discrepancies to the initial process parameter and material density optimization study.

中文翻译：

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激光粉末床熔融加工CuCrZr 加工性能及热处理对电导率、显微组织和力学性能的影响

CuCrZr 零件是通过激光束粉末床融合 (LB-PBF) 技术制造的，并经过不同的热处理。因此，考虑了四种不同的条件进行进一步研究，即竣工条件、最大硬度 (MH) 和最大电导率 (MC) 的条件以及代表硬度和电导率 (H&C) 之间折衷的条件. 研究了单调和循环载荷下的微观结构演变和性能。无论考虑何种条件，断裂表面都显示出大量工艺引起的缺陷，例如未熔合 (LoF) 和孔隙。发现这些缺陷对拉伸行为的影响是微不足道的，而由于大 LoF 缺陷促进了多裂纹形核，疲劳性能受到显着影响。