Tensile Properties of Cast Alloy IN625 in Relation to δ Phase Precipitation

• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2019,（4）
• 页码范围: 535-540
• 页数: 6页
• 语种: 英文

摘要

The relationship between the tensile properties and δ (delta) phase precipitation in cast alloy IN625 was investigated in this paper.Although the influences of δ phase on the mechanical properties have been pointed out in our previous work,the relationship is still not directly determined due to the coexistence of γ" (gamma double prime) and δ precipitates.In order to exclude the effect from γ" phase,various fractions of δ precipitates with few γ" precipitates were obtained by a set of experimental alloys aging at 750 ℃,and tensile tests were conducted in parallel.The results showed that both yield strength and ultimate tensile strength increased nearly in linear with increasing δ phase fraction,while the elongation was relatively and limitedly affected by δ precipitation when the area fraction of δ phase was above 10％.