Microstructural Evolution and Room Temperature Mechanical Properties in Additively Manufactured Mar M 509 With Short Cycle Heat Treatment

材料科学 微观结构 晶界 碳化物 延伸率 等轴晶 复合材料 延展性(地球科学) 冶金 蠕动 极限抗拉强度
作者
Shreehard Sahu,Bikash Kumar,Siba Sundar Sahoo,Balila Nagamani Jaya,Dheepa Srinivasan
出处
期刊:Journal of Engineering Materials and Technology-transactions of The Asme [ASME International]
卷期号:146 (1) 被引量:1
标识
DOI:10.1115/1.4063257
摘要

Abstract The Co-based superalloy Mar M 509, known for its high-temperature oxidation and hot corrosion resistance, is processed via laser powder bed fusion (LPBF). Microstructure and mechanical properties of Mar M 509 in as-printed (As-P) and heat-treated (HT) states are compared based on two build orientations (longitudinal (L) and transverse (T)) to establish structure-property links with heat treatment. The As-P condition displays a distinct cellular microstructure (500–600 nm) with 50–60 nm carbide particles adorning cell boundaries. Longitudinal (L) build has columnar grains (8–35 μm along the major axis) with a grain aspect ratio of 4, while transverse (T) orientation exhibits equiaxed, bimodal microstructure (5–10 μm and 15–25 μm grain sizes). Strong <001> texture is noted in L. Mechanical properties at room temperature differ between L and T; T (569 ± 12 HV) has 15% higher hardness compared to L (489 ± 18 HV) and 34% higher 0.2% yield strength (YS), but 30% lower elongation than L. Post a short heat treatment cycle at 1250 °C, weld bead structure and cell boundaries break down. Both L (25–33 μm along the major axis) and T orientations (5–42 μm) experience grain growth, and carbides coarsen (250–350 nm). Post-heat treatment, dislocation density decreases, indicating recrystallization; lattice parameter of matrix reduces, implying solute depletion contributing to carbide enrichment. Yield strength drops from 860 MPa to 740 MPa in L and from 1150 MPa to 840 MPa in T, with ductility rising from 14% to 23% in L.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
科研小白完成签到,获得积分10
刚刚
1秒前
9℃发布了新的文献求助10
1秒前
甩看文献完成签到,获得积分10
1秒前
1秒前
欣喜书桃关注了科研通微信公众号
2秒前
2秒前
真实的熊猫完成签到,获得积分10
2秒前
小张不慌完成签到,获得积分10
3秒前
3秒前
3秒前
3秒前
3秒前
十三完成签到,获得积分10
4秒前
juan发布了新的文献求助10
4秒前
丘比特应助白小白采纳,获得10
4秒前
4秒前
晓军发布了新的文献求助20
4秒前
5秒前
zxl完成签到,获得积分10
6秒前
专心搞学术完成签到,获得积分10
6秒前
FFF发布了新的文献求助10
6秒前
李小胖发布了新的文献求助20
6秒前
李健应助故意的绿竹采纳,获得10
6秒前
勤恳的断秋完成签到 ,获得积分10
7秒前
VDC发布了新的文献求助10
7秒前
7秒前
jasmine970000发布了新的文献求助100
7秒前
酷波er应助camellia采纳,获得10
8秒前
Zoe发布了新的文献求助10
8秒前
8秒前
8秒前
啊实打实完成签到,获得积分10
8秒前
9秒前
9秒前
10秒前
参上完成签到,获得积分10
11秒前
mingjie完成签到,获得积分10
11秒前
yam001完成签到,获得积分10
11秒前
aaaaa发布了新的文献求助10
11秒前
高分求助中
Continuum Thermodynamics and Material Modelling 3000
Production Logging: Theoretical and Interpretive Elements 2700
Social media impact on athlete mental health: #RealityCheck 1020
Ensartinib (Ensacove) for Non-Small Cell Lung Cancer 1000
Unseen Mendieta: The Unpublished Works of Ana Mendieta 1000
Bacterial collagenases and their clinical applications 800
El viaje de una vida: Memorias de María Lecea 800
热门求助领域 (近24小时)
化学 材料科学 生物 医学 工程类 有机化学 生物化学 物理 纳米技术 计算机科学 内科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 量子力学 光电子学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3527723
求助须知:如何正确求助?哪些是违规求助? 3107826
关于积分的说明 9286663
捐赠科研通 2805577
什么是DOI,文献DOI怎么找? 1539998
邀请新用户注册赠送积分活动 716878
科研通“疑难数据库(出版商)”最低求助积分说明 709762